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CWE-804

Guessable CAPTCHA

5 CVEs Avg CVSS 5.1 MITRE
0
CRITICAL
0
HIGH
5
MEDIUM
0
LOW
0
POC
0
KEV

Monthly

CVE-2026-40935 PHP MEDIUM This Month

WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive `strcasecmp` comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session token, an attacker can trivially brute-force the CAPTCHA on any endpoint that relies on `Captcha::validation()` (user registration, password recovery, contact form, etc.) in at most ~33 requests per session. Commit bf1c76989e6a9054be4f0eb009d68f0f2464b453 contains a fix.

PHP Information Disclosure
NVD GitHub
CVSS 3.1
5.3
EPSS
0.0%
CVE-2025-70129 MEDIUM This Month

If the anti spam-captcha functionality in PluXml versions 5.8.22 and earlier is enabled, a captcha challenge is generated with a format that can be automatically recognized for articles, such that an automated script is able to solve this anti-spam mechanism trivially and publish spam comments. [CVSS 5.3 MEDIUM]

Information Disclosure
NVD GitHub VulDB
CVSS 3.1
5.3
EPSS
0.0%
CVE-2026-27411 MEDIUM This Month

The SiteGuard WP Plugin for WordPress through version 1.7.9 contains a guessable CAPTCHA implementation that allows attackers to bypass security protections without authentication. This vulnerability enables attackers to circumvent the plugin's functionality controls and potentially gain unauthorized access to protected resources or perform actions that should be restricted.

Authentication Bypass
NVD
CVSS 3.1
5.4
EPSS
0.0%
CVE-2025-32036 MEDIUM PATCH This Month

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Rated medium severity (CVSS 4.2), this vulnerability is remotely exploitable, no authentication required.

Information Disclosure Microsoft Dotnetnuke
NVD GitHub
CVSS 3.1
4.2
EPSS
0.2%
CVE-2025-1262 MEDIUM PATCH This Month

The Advanced Google reCaptcha plugin for WordPress is vulnerable to CAPTCHA Bypass in versions up to, and including, 1.27 . Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

PHP WordPress Authentication Bypass Google Advanced Google Recaptcha
NVD
CVSS 3.1
5.3
EPSS
0.3%
EPSS 0% CVSS 5.3
MEDIUM This Month

WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive `strcasecmp` comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session token, an attacker can trivially brute-force the CAPTCHA on any endpoint that relies on `Captcha::validation()` (user registration, password recovery, contact form, etc.) in at most ~33 requests per session. Commit bf1c76989e6a9054be4f0eb009d68f0f2464b453 contains a fix.

PHP Information Disclosure
NVD GitHub
EPSS 0% CVSS 5.3
MEDIUM This Month

If the anti spam-captcha functionality in PluXml versions 5.8.22 and earlier is enabled, a captcha challenge is generated with a format that can be automatically recognized for articles, such that an automated script is able to solve this anti-spam mechanism trivially and publish spam comments. [CVSS 5.3 MEDIUM]

Information Disclosure
NVD GitHub VulDB
EPSS 0% CVSS 5.4
MEDIUM This Month

The SiteGuard WP Plugin for WordPress through version 1.7.9 contains a guessable CAPTCHA implementation that allows attackers to bypass security protections without authentication. This vulnerability enables attackers to circumvent the plugin's functionality controls and potentially gain unauthorized access to protected resources or perform actions that should be restricted.

Authentication Bypass
NVD
EPSS 0% CVSS 4.2
MEDIUM PATCH This Month

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Rated medium severity (CVSS 4.2), this vulnerability is remotely exploitable, no authentication required.

Information Disclosure Microsoft Dotnetnuke
NVD GitHub
EPSS 0% CVSS 5.3
MEDIUM PATCH This Month

The Advanced Google reCaptcha plugin for WordPress is vulnerable to CAPTCHA Bypass in versions up to, and including, 1.27 . Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

PHP WordPress Authentication Bypass +2
NVD

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