Updated 3 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

16 results

Sep 2, 2026Kludex Starlette HTTP Request/Response Smuggling VulnerabilityCVE-2026-48710 · Other software · Kludex · reported by GitHubExploitedMedium 6.5
Kludex Starlette contains a HTTP request/response smuggling vulnerability that could allow attackers to inject paths into the host part, prepending the actual path leading to issues such as authentication bypass when the authentication depends on the reconstructed URL’s path. This vulnerability could be chaned with CVE-2026-42271.
Product
Starlette
On CISA’s list since
Sep 2, 2026 (federal fix deadline Sep 16, 2026)
What to do
Attackers are using this now. Install Kludex’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 badhost.org github.com
Aug 24, 2026Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control VulnerabilityCVE-2026-21962 · Websites & servers · Oracle · reported by secalert_us@oracle.comExploitedCritical 10
Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in contain an improper access control vulnerability that can result in unauthorized creation, deletion or modification access to critical data as well as unauthorized access to critical data or complete access to all Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in accessible data.
Product
HTTP Server and Oracle Weblogic Server Proxy Plug-in
On CISA’s list since
Aug 24, 2026 (federal fix deadline Aug 27, 2026)
What to do
Attackers are using this now. Install Oracle’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 oracle.com github.com
May 1, 2025Apache HTTP Server Improper Escaping of Output VulnerabilityCVE-2024-38475 · Websites & servers · Apache · reported by security@apache.orgExploitedCritical 9.1
Apache HTTP Server contains an improper escaping of output vulnerability in mod_rewrite that allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure.
Product
HTTP Server
On CISA’s list since
May 1, 2025 (federal fix deadline May 22, 2025)
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 httpd.apache.org security.netapp.com
Jan 13, 2025Qlik Sense HTTP Tunneling VulnerabilityCVE-2023-48365 · Other software · Qlik · reported by MITREExploitedRansomwareCritical 9.6
Qlik Sense contains an HTTP tunneling vulnerability that allows an attacker to escalate privileges and execute HTTP requests on the backend server hosting the software.
Product
Sense
On CISA’s list since
Jan 13, 2025 (federal fix deadline Feb 3, 2025)
What to do
Attackers are using this now. Install Qlik’s update today (ransomware groups use this one). 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 community.qlik.com community.qlik.com
Nov 7, 2024Nostromo nhttpd Directory Traversal VulnerabilityCVE-2019-16278 · Other software · Nostromo · reported by MITREExploitedCritical 9.8
Nostromo nhttpd contains a directory traversal vulnerability in the http_verify() function in a non-chrooted nhttpd server allowing for remote code execution.
Product
nhttpd
On CISA’s list since
Nov 7, 2024 (federal fix deadline Nov 28, 2024)
What to do
Attackers are using this now. Install Nostromo’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 packetstormsecurity.com packetstormsecurity.com
Jul 9, 2024Rejetto HTTP File Server Improper Neutralization of Special Elements Used in a Template Engine VulnerabilityCVE-2024-23692 · Other software · Rejetto · reported by VulnCheckExploitedRansomwareCritical 9.8
Rejetto HTTP File Server contains an improper neutralization of special elements used in a template engine vulnerability. This allows a remote, unauthenticated attacker to execute commands on the affected system by sending a specially crafted HTTP request.
Product
HTTP File Server
On CISA’s list since
Jul 9, 2024 (federal fix deadline Jul 30, 2024)
What to do
Attackers are using this now. Install Rejetto’s update today (ransomware groups use this one). 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 github.com mohemiv.com
Dec 7, 2023Qlik Sense HTTP Tunneling VulnerabilityCVE-2023-41265 · Other software · Qlik · reported by MITREExploitedRansomwareCritical 9.6
Qlik Sense contains an HTTP tunneling vulnerability that allows an attacker to escalate privileges and execute HTTP requests on the backend server hosting the software.
Product
Sense
On CISA’s list since
Dec 7, 2023 (federal fix deadline Dec 28, 2023)
What to do
Attackers are using this now. Install Qlik’s update today (ransomware groups use this one). 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 community.qlik.com community.qlik.com
Oct 10, 2023HTTP/2 Rapid Reset Attack VulnerabilityCVE-2023-44487 · Other software · IETF · reported by MITREExploitedHigh 7.5
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
Product
HTTP/2
On CISA’s list since
Oct 10, 2023 (federal fix deadline Oct 31, 2023)
What to do
Attackers are using this now. Install IETF’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 openwall.com openwall.com
Aug 18, 2022SAP Multiple Products HTTP Request Smuggling VulnerabilityCVE-2022-22536 · Network & remote access · SAP · reported by cna@sap.comExploitedCritical 10
SAP NetWeaver Application Server ABAP, SAP NetWeaver Application Server Java, ABAP Platform, SAP Content Server and SAP Web Dispatcher allow HTTP request smuggling. An unauthenticated attacker can prepend a victim's request with arbitrary data, allowing for function execution impersonating the victim or poisoning intermediary Web caches.
Product
Multiple Products
On CISA’s list since
Aug 18, 2022 (federal fix deadline Sep 8, 2022)
What to do
Attackers are using this now. Install SAP’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 launchpad.support.sap.com sap.com
Apr 6, 2022Microsoft HTTP Protocol Stack Remote Code Execution VulnerabilityCVE-2021-31166 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft HTTP Protocol Stack contains a vulnerability in http.sys that allows for remote code execution.
Product
HTTP Protocol Stack
On CISA’s list since
Apr 6, 2022 (federal fix deadline Apr 27, 2022)
What to do
Attackers are using this now. Install Microsoft’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 packetstormsecurity.com portal.msrc.microsoft.com
Mar 25, 2022Rejetto HTTP File Server (HFS) Remote Code Execution VulnerabilityCVE-2014-6287 · Other software · Rejetto · reported by MITREExploitedCritical 9.8
The findMacroMarker function in parserLib.pas in Rejetto HTTP File Server (HFS or HttpFileServer) allows remote attackers to execute arbitrary programs.
Product
HTTP File Server (HFS)
On CISA’s list since
Mar 25, 2022 (federal fix deadline Apr 15, 2022)
What to do
Attackers are using this now. Install Rejetto’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 packetstormsecurity.com packetstormsecurity.com
Feb 10, 2022Microsoft HTTP.sys Remote Code Execution VulnerabilityCVE-2015-1635 · Computers, phones & browsers · Microsoft · reported by secure@microsoft.comExploitedCritical 9.8
Microsoft HTTP protocol stack (HTTP.sys) contains a vulnerability that allows for remote code execution.
Product
HTTP.sys
On CISA’s list since
Feb 10, 2022 (federal fix deadline Aug 10, 2022)
What to do
Attackers are using this now. Install Microsoft’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 packetstormsecurity.com osvdb.org
Dec 1, 2021Apache HTTP Server-Side Request Forgery (SSRF)CVE-2021-40438 · Websites & servers · Apache · reported by security@apache.orgExploitedRansomwareCritical 9
A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.
Product
Apache
On CISA’s list since
Dec 1, 2021 (federal fix deadline Dec 15, 2021)
What to do
Attackers are using this now. Install Apache’s update today (ransomware groups use this one). 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 cert-portal.siemens.com httpd.apache.org
Nov 3, 2021Apache HTTP Server Path Traversal VulnerabilityCVE-2021-42013 · Websites & servers · Apache · reported by security@apache.orgExploitedRansomwareCritical 9.8
Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default require all denied or if CGI scripts are enabled. This CVE ID resolves an incomplete patch for CVE-2021-41773.
Product
HTTP Server
On CISA’s list since
Nov 3, 2021 (federal fix deadline Nov 17, 2021)
What to do
Attackers are using this now. Install Apache’s update today (ransomware groups use this one). 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 jvn.jp packetstormsecurity.com
Nov 3, 2021Apache HTTP Server Path Traversal VulnerabilityCVE-2021-41773 · Websites & servers · Apache · reported by security@apache.orgExploitedRansomwareCritical 9.8
Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default �require all denied� or if CGI scripts are enabled. The original patch issued under this CVE ID is insufficient, please review remediation information under CVE-2021-42013.
Product
HTTP Server
On CISA’s list since
Nov 3, 2021 (federal fix deadline Nov 17, 2021)
What to do
Attackers are using this now. Install Apache’s update today (ransomware groups use this one). 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 packetstormsecurity.com packetstormsecurity.com
Nov 3, 2021Apache HTTP Server Privilege Escalation VulnerabilityCVE-2019-0211 · Websites & servers · Apache · reported by security@apache.orgExploitedHigh 7.8
Apache HTTP Server, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute code with the privileges of the parent process (usually root) by manipulating the scoreboard.
Product
HTTP Server
On CISA’s list since
Nov 3, 2021 (federal fix deadline May 3, 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

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.

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Vulnerability database

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