Vulnerability Details CVE-2026-40935
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 9.5%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-40935
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cpe:2.3:a:wwbn:avideo:10.1
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cpe:2.3:a:wwbn:avideo:10.2
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cpe:2.3:a:wwbn:avideo:10.4
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cpe:2.3:a:wwbn:avideo:10.8
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cpe:2.3:a:wwbn:avideo:11.1
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cpe:2.3:a:wwbn:avideo:11.1.1
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cpe:2.3:a:wwbn:avideo:11.5
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cpe:2.3:a:wwbn:avideo:11.6
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cpe:2.3:a:wwbn:avideo:12.4
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cpe:2.3:a:wwbn:avideo:14.2
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cpe:2.3:a:wwbn:avideo:14.3
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cpe:2.3:a:wwbn:avideo:14.3.1
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cpe:2.3:a:wwbn:avideo:14.4
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cpe:2.3:a:wwbn:avideo:2.2
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cpe:2.3:a:wwbn:avideo:2.4
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cpe:2.3:a:wwbn:avideo:2.7
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cpe:2.3:a:wwbn:avideo:3.4
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cpe:2.3:a:wwbn:avideo:3.4.1
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cpe:2.3:a:wwbn:avideo:4.0
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cpe:2.3:a:wwbn:avideo:4.0.1
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cpe:2.3:a:wwbn:avideo:4.0.2
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cpe:2.3:a:wwbn:avideo:5.0
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cpe:2.3:a:wwbn:avideo:6.5
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cpe:2.3:a:wwbn:avideo:7.2
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cpe:2.3:a:wwbn:avideo:7.3
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cpe:2.3:a:wwbn:avideo:7.4
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cpe:2.3:a:wwbn:avideo:7.5
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cpe:2.3:a:wwbn:avideo:7.6
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cpe:2.3:a:wwbn:avideo:7.7
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cpe:2.3:a:wwbn:avideo:7.8
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cpe:2.3:a:wwbn:avideo:8.1
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cpe:2.3:a:wwbn:avideo:8.5
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cpe:2.3:a:wwbn:avideo:8.6
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cpe:2.3:a:wwbn:avideo:8.7
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cpe:2.3:a:wwbn:avideo:8.9
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cpe:2.3:a:wwbn:avideo:8.9.1