| Title | Admidio <= 5.1.0 Authentication Bypass Issues |
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| Description | An authentication bypass vulnerability was found in the "/modules/forum.php" file of Admidio. The module visibility system supports three modes: 0 (disabled), 1 (public), and 2 (login-only). When an administrator sets the forum module to "login-only" mode (forum_module_enabled = 2), the application fails to enforce the authentication check. The if-elseif chain at lines 54-59 only handles mode 0 and mode 1, but entirely omits the condition for mode 2. As a result, code execution falls through to the switch statement, and all read operations (cards, list, topic) are served to unauthenticated users without any access control check. |
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| Source | ⚠️ https://github.com/Admidio/admidio/security/advisories/GHSA-cf48-6jrq-gjcm |
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| User | Fklov (UID 98102) |
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| Submission | 07/20/2026 18:45 (2 months ago) |
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| Moderation | 09/06/2026 05:27 (2 months later) |
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| Status | Duplicate |
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| VulDB entry | 385591 [admidio up to 5.0.10 Forum modules/forum.php access control] |
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| Points | 0 |
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