CVE-2025-54336 – Plesk Obsidian Authentication Bypass Vulnerability

The following table lists the changes that have been made to the
CVE-2025-54336 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • CVE Modified
    by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 19, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-697
  • New CVE Received
    by [email protected]

    Aug. 19, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://support.plesk.com/hc/en-us/articles/33785727869847-Vulnerability-CVE-2025-54336
    Added Reference https://www.plesk.com/blog/plesk-news-announcements/introducing-plesk-obsidian-18-0-70-anniversary-edition/
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