Updated 7 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,762exploited flaws on CISA’s list

34added in the last 30 days

344new WordPress flaws this week

390,080entries in the database

310 results · page 3 of 7

Mar 13, 2024Denial of Service due to improper input validation vulnerability for HTTP/2 requests in Apache Tomcat.CVE-2024-24549 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Denial of Service due to improper input validation vulnerability for HTTP/2 requests in Apache Tomcat. When processing an HTTP/2 request, if the request exceeded any of the configured limits for headers, the associated HTTP/2 stream was not reset until after all of the headers had been processed.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Mar 13, 2024Denial of Service via incomplete cleanup vulnerability in Apache Tomcat.CVE-2024-23672 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.3
Denial of Service via incomplete cleanup vulnerability in Apache Tomcat. It was possible for WebSocket clients to keep WebSocket connections open leading to increased resource consumption.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M16, from 10.1.0-M1 through 10.1.18, from 9.0.0-M1 through 9.0.85, from 8.5.0 through 8.5.98. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M17, 10.1.19, 9.0.86 or 8.5.99 which fix the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Jan 19, 2024Generation of Error Message Containing Sensitive Information vulnerability in Apache Tomcat.This issue affects Apache Tomcat: from 8.5.7 through 8.5.63, from 9.CVE-2024-21733 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.3
Generation of Error Message Containing Sensitive Information vulnerability in Apache Tomcat.This issue affects Apache Tomcat: from 8.5.7 through 8.5.63, from 9.0.0-M11 through 9.0.43. Other, EOL versions may also be affected. Users are recommended to upgrade to version 8.5.64 onwards or 9.0.44 onwards, which contain a fix for the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org packetstormsecurity.com
Nov 28, 2023Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82 CVE-2023-46589 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82 and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Oct 10, 2023Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 CVE-2023-45648 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.3
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Oct 10, 2023Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 thrCVE-2023-42795 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.3
Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Oct 10, 2023Incomplete Cleanup vulnerability in Apache Tomcat.CVE-2023-42794 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.9
Incomplete Cleanup vulnerability in Apache Tomcat. The internal fork of Commons FileUpload packaged with Apache Tomcat 9.0.70 through 9.0.80 and 8.5.85 through 8.5.93 included an unreleased, in progress refactoring that exposed a potential denial of service on Windows if a web application opened a stream for an uploaded file but failed to close the stream. The file would never be deleted from disk creating the possibility of an eventual denial of service due to the disk being full. Other, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org openwall.com
Sep 13, 2023Important: Authentication Bypass CVE-2023-41081 The mod_jk component of Apache Tomcat Connectors in some circumstances, such as when a configuration included "CVE-2023-41081 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Important: Authentication Bypass CVE-2023-41081 The mod_jk component of Apache Tomcat Connectors in some circumstances, such as when a configuration included "JkOptions +ForwardDirectories" but the configuration did not provide explicit mounts for all possible proxied requests, mod_jk would use an implicit mapping and map the request to the first defined worker. Such an implicit mapping could result in the unintended exposure of the status worker and/or bypass security constraints configured in httpd. As of JK 1.2.49, the implicit mapping functionality has been removed and all mappings must now be via explicit configuration. Only mod_jk is affected by this issue. The ISAPI redirector is not affected. This issue affects Apache Tomcat Connectors (mod_jk only): from 1.2.0 through 1.2.48. Users are recommended to upgrade to version 1.2.49, which fixes the issue. History 2023-09-13 Original advisory 2023-09-28 Updated summary
Product
Apache Tomcat Connectors
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Aug 25, 2023URL Redirection to Untrusted Site ('Open Redirect') vulnerability in FORM authentication feature Apache Tomcat.This issue affects Apache Tomcat: from 11.0.0-M1 CVE-2023-41080 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.1
URL Redirection to Untrusted Site ('Open Redirect') vulnerability in FORM authentication feature Apache Tomcat.This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.0.12, from 9.0.0-M1 through 9.0.79 and from 8.5.0 through 8.5.92. Older, EOL versions may also be affected. The vulnerability is limited to the ROOT (default) web application.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org lists.apache.org
Jun 21, 2023A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SECVE-2023-34981 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SEND_HEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (mod_proxy_ajp) would use the response headers from the previous request leading to an information leak.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org security.netapp.com
May 22, 2023The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87.CVE-2023-28709 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount parameters in the query string, the limit for uploaded request parts could be bypassed with the potential for a denial of service to occur.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Mar 22, 2023When using the RemoteIpFilter with requests received from a reverse proxy via HTTP that include the X-Forwarded-Proto header set to https, session cookiesCVE-2023-28708 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 4.3
When using the RemoteIpFilter with requests received from a reverse proxy via HTTP that include the X-Forwarded-Proto header set to https, session cookies created by Apache Tomcat 11.0.0-M1 to 11.0.0.-M2, 10.1.0-M1 to 10.1.5, 9.0.0-M1 to 9.0.71 and 8.5.0 to 8.5.85 did not include the secure attribute. This could result in the user agent transmitting the session cookie over an insecure channel. Older, EOL versions may also be affected.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org lists.apache.org
Mar 1, 2023 Dell NetWorker versions 19.5 and earlier contain 'Apache Tomcat' version disclosure vulnerability.CVE-2023-25544 · Other software · Dell · reported by security_alert@emc.comHigh 7.5
Dell NetWorker versions 19.5 and earlier contain 'Apache Tomcat' version disclosure vulnerability. A NetWorker server user with remote access to NetWorker clients may potentially exploit this vulnerability and may launch target-specific attacks.
Product
Dell NetWorker, NVE
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record dell.com dell.com
Jan 3, 2023The JsonErrorReportValve in Apache Tomcat 8.5.83, 9.0.40 to 9.0.68 and 10.1.0-M1 to 10.1.1 did not escape the type, message or description values.CVE-2022-45143 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The JsonErrorReportValve in Apache Tomcat 8.5.83, 9.0.40 to 9.0.68 and 10.1.0-M1 to 10.1.1 did not escape the type, message or description values. In some circumstances these are constructed from user provided data and it was therefore possible for users to supply values that invalidated or manipulated the JSON output.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org security.gentoo.org
Nov 1, 2022If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejeCVE-2022-42252 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org security.gentoo.org
Sep 28, 2022The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremeCVE-2021-43980 · Websites & servers · Apache Software Foundation · reported by security@apache.orgLow 3.7
The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Jun 23, 2022In Apache Tomcat 10.1.0-M1 to 10.1.0-M16, 10.0.0-M1 to 10.0.22, 9.0.30 to 9.0.64 and 8.5.50 to 8.5.81 the Form authentication example in the examples web applicCVE-2022-34305 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.1
In Apache Tomcat 10.1.0-M1 to 10.1.0-M16, 10.0.0-M1 to 10.0.22, 9.0.30 to 9.0.64 and 8.5.50 to 8.5.81 the Form authentication example in the examples web application displayed user provided data without filtering, exposing a XSS vulnerability.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
May 13, 2022If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache TomcatCVE-2022-25762 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 8.6
If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache Tomcat 9.0.0.M1 to 9.0.20, it is possible that the application will continue to use the socket after it has been closed. The error handling triggered in this case could cause the a pooled object to be placed in the pool twice. This could result in subsequent connections using the same object concurrently which could result in data being returned to the wrong use and/or other errors.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org security.netapp.com
May 12, 2022The documentation of Apache Tomcat 10.1.0-M1 to 10.1.0-M14, 10.0.0-M1 to 10.0.20, 9.0.13 to 9.0.62 and 8.5.38 to 8.5.78 for the EncryptInterceptor incorrectly sCVE-2022-29885 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The documentation of Apache Tomcat 10.1.0-M1 to 10.1.0-M14, 10.0.0-M1 to 10.0.20, 9.0.13 to 9.0.62 and 8.5.38 to 8.5.78 for the EncryptInterceptor incorrectly stated it enabled Tomcat clustering to run over an untrusted network. This was not correct. While the EncryptInterceptor does provide confidentiality and integrity protection, it does not protect against all risks associated with running over any untrusted network, particularly DoS risks.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record packetstormsecurity.com lists.apache.org
Jan 27, 2022The fix for bug CVE-2020-9484 introduced a time of check, time of use vulnerability into Apache Tomcat 10.1.0-M1 to 10.1.0-M8, 10.0.0-M5 to 10.0.14, 9.0.35 to 9CVE-2022-23181 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7
The fix for bug CVE-2020-9484 introduced a time of check, time of use vulnerability into Apache Tomcat 10.1.0-M1 to 10.1.0-M8, 10.0.0-M5 to 10.0.14, 9.0.35 to 9.0.56 and 8.5.55 to 8.5.73 that allowed a local attacker to perform actions with the privileges of the user that the Tomcat process is using. This issue is only exploitable when Tomcat is configured to persist sessions using the FileStore.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org lists.debian.org
Oct 14, 2021The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak.CVE-2021-42340 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record kc.mcafee.com lists.apache.org
Sep 16, 2021Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets.CVE-2021-41079 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org lists.apache.org
Jul 12, 2021Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstanceCVE-2021-33037 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.3
Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record kc.mcafee.com lists.apache.org
Jul 12, 2021A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protectCVE-2021-30640 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 6.5
A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.apache.org lists.debian.org
Jul 12, 2021A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service.CVE-2021-30639 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record kc.mcafee.com lists.apache.org
Mar 1, 2021The fix for CVE-2020-9484 was incomplete.CVE-2021-25329 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7
The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Mar 1, 2021When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headeCVE-2021-25122 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Jan 14, 2021When serving resources from a network location using the NTFS file system, Apache Tomcat versions 10.0.0-M1 to 10.0.0-M9, 9.0.0.M1 to 9.0.39, 8.5.0 to 8.5.59 anCVE-2021-24122 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.9
When serving resources from a network location using the NTFS file system, Apache Tomcat versions 10.0.0-M1 to 10.0.0-M9, 9.0.0.M1 to 9.0.39, 8.5.0 to 8.5.59 and 7.0.0 to 7.0.106 were susceptible to JSP source code disclosure in some configurations. The root cause was the unexpected behaviour of the JRE API File.getCanonicalPath() which in turn was caused by the inconsistent behaviour of the Windows API (FindFirstFileW) in some circumstances.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Dec 3, 2020While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request hCVE-2020-17527 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.apache.org
Oct 12, 2020If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent sCVE-2020-13943 · Websites & servers · Apache · reported by security@apache.orgMedium 4.3
If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Jul 14, 2020The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7CVE-2020-13935 · Websites & servers · Apache · reported by security@apache.orgHigh 7.5
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Jul 14, 2020An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgradCVE-2020-13934 · Websites & servers · Apache · reported by security@apache.orgHigh 7.5
An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Jun 26, 2020A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usagCVE-2020-11996 · Websites & servers · Apache · reported by security@apache.orgHigh 7.5
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
May 20, 2020When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contCVE-2020-9484 · Websites & servers · Apache · reported by security@apache.orgHigh 7
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org packetstormsecurity.com
Feb 24, 2020Apache Tomcat Improper Privilege Management VulnerabilityCVE-2020-1938 · Websites & servers · Apache · reported by security@apache.orgExploitedCritical 9.8
Apache Tomcat treats Apache JServ Protocol (AJP) connections as having higher trust than, for example, a similar HTTP connection. If such connections are available to an attacker, they can be exploited.
Product
Tomcat
On CISA’s list since
Mar 3, 2022 (federal fix deadline Mar 17, 2022)
What to do
Attackers are using this now. Install Apache’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.
Full record and what to do →NVD record CISA catalog lists.opensuse.org lists.opensuse.org
Feb 24, 2020In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some CVE-2020-1935 · Websites & servers · Apache · reported by security@apache.orgMedium 4.8
In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.apache.org
Feb 24, 2020The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression.CVE-2019-17569 · Websites & servers · Apache · reported by security@apache.orgMedium 4.8
The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.apache.org
Dec 23, 2019When Apache Tomcat 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, 7.0.0 and 7.0.97 is configured with the JMX Remote Lifecycle Listener, a local attacker without access tCVE-2019-12418 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7
When Apache Tomcat 9.0.0.M1 to 9.0.28, 8.5.0 to 8.5.47, 7.0.0 and 7.0.97 is configured with the JMX Remote Lifecycle Listener, a local attacker without access to the Tomcat process or configuration files is able to manipulate the RMI registry to perform a man-in-the-middle attack to capture user names and passwords used to access the JMX interface. The attacker can then use these credentials to access the JMX interface and gain complete control over the Tomcat instance.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.apache.org
Dec 23, 2019When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perfCVE-2019-17563 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.apache.org
Jun 21, 2019The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0CVE-2019-10072 · Websites & servers · Apache · reported by security@apache.orgHigh 7.5
The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not sending WINDOW_UPDATE messages for the connection window (stream 0) clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org securityfocus.com
May 28, 2019The SSI printenv command in Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 echoes user provided data without escaping and is, thereforeCVE-2019-0221 · Websites & servers · Apache · reported by security@apache.orgMedium 6.1
The SSI printenv command in Apache Tomcat 9.0.0.M1 to 9.0.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 echoes user provided data without escaping and is, therefore, vulnerable to XSS. SSI is disabled by default. The printenv command is intended for debugging and is unlikely to be present in a production website.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Apr 15, 2019When running on Windows with enableCmdLineArguments enabled, the CGI Servlet in Apache Tomcat 9.0.0.M1 to 9.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 is vulneraCVE-2019-0232 · Websites & servers · Apache · reported by security@apache.orgHigh 8.1
When running on Windows with enableCmdLineArguments enabled, the CGI Servlet in Apache Tomcat 9.0.0.M1 to 9.0.17, 8.5.0 to 8.5.39 and 7.0.0 to 7.0.93 is vulnerable to Remote Code Execution due to a bug in the way the JRE passes command line arguments to Windows. The CGI Servlet is disabled by default. The CGI option enableCmdLineArguments is disable by default in Tomcat 9.0.x (and will be disabled by default in all versions in response to this vulnerability). For a detailed explanation of the JRE behaviour, see Markus Wulftange's blog (https://codewhitesec.blogspot.com/2016/02/java-and-command-line-injections-in-windows.html) and this archived MSDN blog (https://web.archive.org/web/20161228144344/https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/).
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record packetstormsecurity.com seclists.org
Apr 10, 2019The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted CVE-2019-0199 · Websites & servers · Apache · reported by security@apache.orgHigh 7.5
The HTTP/2 implementation in Apache Tomcat 9.0.0.M1 to 9.0.14 and 8.5.0 to 8.5.37 accepted streams with excessive numbers of SETTINGS frames and also permitted clients to keep streams open without reading/writing request/response data. By keeping streams open for requests that utilised the Servlet API's blocking I/O, clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.
Product
Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Oct 31, 2018The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1CVE-2018-11759 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The Apache Web Server (httpd) specific code that normalised the requested path before matching it to the URI-worker map in Apache Tomcat JK (mod_jk) Connector 1.2.0 to 1.2.44 did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via httpd, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing the application via the reverse proxy. It was also possible in some configurations for a specially constructed request to bypass the access controls configured in httpd. While there is some overlap between this issue and CVE-2018-1323, they are not identical.
Product
Apache Tomcat Connectors
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record securityfocus.com access.redhat.com
Oct 4, 2018When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g.CVE-2018-11784 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 4.3
When the default servlet in Apache Tomcat versions 9.0.0.M1 to 9.0.11, 8.5.0 to 8.5.33 and 7.0.23 to 7.0.90 returned a redirect to a directory (e.g. redirecting to '/foo/' when the user requested '/foo') a specially crafted URL could be used to cause the redirect to be generated to any URI of the attackers choice.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.opensuse.org lists.opensuse.org
Aug 2, 2018If an async request was completed by the application at the same time as the container triggered the async timeout, a race condition existed that could result iCVE-2018-8037 · Websites & servers · Apache Software Foundation · reported by security@apache.orgMedium 5.9
If an async request was completed by the application at the same time as the container triggered the async timeout, a race condition existed that could result in a user seeing a response intended for a different user. An additional issue was present in the NIO and NIO2 connectors that did not correctly track the closure of the connection when an async request was completed by the application and timed out by the container at the same time. This could also result in a user seeing a response intended for another user. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.9 and 8.5.5 to 8.5.31.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record mail-archives.us.apache.org mail-archives.us.apache.org
Aug 2, 2018An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service.CVE-2018-1336 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record mail-archives.us.apache.org securityfocus.com
Aug 1, 2018The host name verification when using TLS with the WebSocket client was missing.CVE-2018-8034 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.5
The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.
Product
Apache Tomcat
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record mail-archives.us.apache.org oracle.com
Jul 31, 2018Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entriesCVE-2018-8020 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.4
Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.
Product
Apache Tomcat Native
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record mail-archives.us.apache.org securityfocus.com
Jul 31, 2018When using an OCSP responder Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 did not correctly handle invalid responses.CVE-2018-8019 · Websites & servers · Apache Software Foundation · reported by security@apache.orgHigh 7.4
When using an OCSP responder Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 did not correctly handle invalid responses. This allowed for revoked client certificates to be incorrectly identified. It was therefore possible for users to authenticate with revoked certificates when using mutual TLS. Users not using OCSP checks are not affected by this vulnerability.
Product
Apache Tomcat Native
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record mail-archives.apache.org securityfocus.com

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

Weekly security brief

The flaws that hit local websites, every Friday.

One short email: what got exploited this week, which WordPress plugins broke, and what to check. Unsubscribe in one click.

Vulnerability database

The flaws that hit local websites, every Friday.

Tell us what you're building.