Critical severity9.8NVD Advisory· Published Aug 19, 2025· Updated Apr 15, 2026
CVE-2025-54336
CVE-2025-54336
Description
In Plesk Obsidian 18.0.70, _isAdminPasswordValid uses an == comparison. Thus, if the correct password is "0e" followed by any digit string, then an attacker can login with any other string that evaluates to 0.0 (such as the 0e0 string). This occurs in admin/plib/LoginManager.php.
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Affected products
1Patches
Vulnerability mechanics
References
3News mentions
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