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.
19 results
Aug 27, 2026In openNDS before 11.0.0, the client_params.sh script, invoked by the openNDS daemon to serve the authenticated client status page, is vulnerable to OS command CVE-2026-38822 · Other software · openNDS · reported by MITREHigh 7.6
In openNDS before 11.0.0, the client_params.sh script, invoked by the openNDS daemon to serve the authenticated client status page, is vulnerable to OS command injection through crafted HTTP GET query parameter keys. An authenticated captive portal user can inject arbitrary shell commands by embedding semicolons in a URL query parameter name.
- Product
- openNDS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 27, 2026A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the opCVE-2026-38821 · Other software · openNDS · reported by MITREHigh 7.1
A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the openNDS daemon (denial of service) and potentially achieve remote code execution. This is in http_microhttpd.c.
- Product
- openNDS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 27, 2026openNDS before 11.0.0 is susceptible to unauthenticated OS command execution via shell command injection through the fas query parameter on the /opennds_preauthCVE-2026-38820 · Other software · openNDS · reported by MITREHigh 8.3
openNDS before 11.0.0 is susceptible to unauthenticated OS command execution via shell command injection through the fas query parameter on the /opennds_preauth/ endpoint because of libopennds.sh.
- Product
- openNDS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 27, 2026Multiple memory leaks in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal network to exhaust all available memory on the device witCVE-2026-38819 · Other software · openNDS · reported by MITREMedium 5.3
Multiple memory leaks in openNDS before 11.0.0 allow an unauthenticated attacker on the captive portal network to exhaust all available memory on the device within minutes.
- Product
- openNDS
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 26, 2024openNDS 10.2.0 is vulnerable to Use-After-Free via /openNDS/src/auth.c.CVE-2024-25763 · Other software · Opennds · reported by MITREMedium 5.5
openNDS 10.2.0 is vulnerable to Use-After-Free via /openNDS/src/auth.c.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jan 26, 2024An issue was discovered in OpenNDS before 10.1.3.CVE-2023-38323 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the status path script entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jan 26, 2024An issue was discovered in OpenNDS before 10.1.3.CVE-2023-38319 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the FAS key entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jan 26, 2024An issue was discovered in OpenNDS before 10.1.3.CVE-2023-38318 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the gateway FQDN entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jan 26, 2024An issue was discovered in OpenNDS before 10.1.3.CVE-2023-38317 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in OpenNDS before 10.1.3. It fails to sanitize the network interface name entry in the configuration file, allowing attackers that have direct or indirect access to this file to execute arbitrary OS commands.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Dec 25, 2023OpenNDS, as used in Sierra Wireless ALEOS before 4.17.0.12 and other products, allows remote attackers to cause a denial of service (NULL pointer dereference, dCVE-2023-38321 · Other software · Sierrawireless · reported by MITREHigh 7.5
OpenNDS, as used in Sierra Wireless ALEOS before 4.17.0.12 and other products, allows remote attackers to cause a denial of service (NULL pointer dereference, daemon crash, and Captive Portal outage) via a GET request to /opennds_auth/ that lacks a custom query string parameter and client-token.
- Product
- Aleos
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in the captive portal in OpenNDS before version 10.1.3.CVE-2023-41102 · Other software · opennds · reported by MITREHigh 7.5
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. It has multiple memory leaks due to not freeing up allocated memory. This may lead to a Denial-of-Service condition due to the consumption of all available memory. Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.
- Product
- opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in the captive portal in OpenNDS before version 10.1.3.CVE-2023-41101 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.
- Product
- Opennds
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS before 10.1.2.CVE-2023-38324 · Other software · Opennds · reported by MITREMedium 5.3
An issue was discovered in OpenNDS before 10.1.2. It allows users to skip the splash page sequence (and directly authenticate) when it is using the default FAS key and OpenNDS is configured as FAS. Affected OpenNDS Captive Portal before version 10.1.2 fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordcwe.mitre.orggithub.com
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before version 10.1.2.CVE-2023-38322 · Other software · Opennds · reported by MITREHigh 7.5
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a do_binauth NULL pointer dereference that be triggered with a crafted GET HTTP request with a missing User-Agent HTTP header. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). The issue occurs when the client is about to be authenticated, and can be triggered only when the BinAuth option is set. Affected OpenNDS Captive Portal before version 10.1.2 fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before version 10.1.2.CVE-2023-38320 · Other software · Opennds · reported by MITREHigh 7.5
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a show_preauthpage NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing User-Agent header. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). This problem was fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before version 10.1.2.CVE-2023-38316 · Other software · Opennds · reported by MITRECritical 9.8
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. When the custom unescape callback is enabled, attackers can execute arbitrary OS commands by inserting them into the URL portion of HTTP GET requests. Affected OpenNDS Captive Portal before version 10.1.2 fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before version 10.1.2.CVE-2023-38315 · Other software · Opennds · reported by MITREHigh 7.5
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a try_to_authenticate NULL pointer dereference that can be triggered with a crafted GET HTTP with a missing client token query string parameter. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). Affected OpenNDS Captive Portal before version 10.1.2 fixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on 28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before version 10.1.2.CVE-2023-38314 · Other software · Opennds · reported by MITREMedium 6.5
An issue was discovered in OpenNDS Captive Portal before version 10.1.2. It has a NULL pointer dereference in preauthenticated() that can be triggered with a crafted GET HTTP request with a missing redirect query string parameter. Triggering this issue results in crashing OpenNDS (a Denial-of-Service condition). Affected OpenNDS Captive Portal before version 10.1.2 fixed infixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Nov 17, 2023An issue was discovered in OpenNDS Captive Portal before 10.1.2.CVE-2023-38313 · Other software · Opennds · reported by MITREHigh 7.5
An issue was discovered in OpenNDS Captive Portal before 10.1.2. it has a do_binauth NULL pointer dereference that can be triggered with a crafted GET HTTP request with a missing client redirect query string parameter. Triggering this issue results in crashing openNDS (a Denial-of-Service condition). The issue occurs when the client is about to be authenticated, and can be triggered only when the BinAuth option is set. Affected OpenNDS Captive Portal before version 10.1.2 fixed infixed in OpenWrt master, OpenWrt 23.05 and OpenWrt 22.03 on28. August 2023 by updating OpenNDS to version 10.1.3.
- Product
- Captive Portal
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
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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