CVE-2025-54336
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Obsidian
PublishedAug 19, 2025
First seenAug 19, 2025
Weakness typeCWE-697CWE-697
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Plesk Obsidian | 18.0.70 | — |
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