CVE-2025-54336

Published Aug 19, 2025

Updated

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.

Affected Software

1 affected component

Plesk Obsidian=18.0.70

Event History

Aug 19, 2025

CVE Published

via MITRE·12:00 AM

Data Sourced

via MITRE·12:00 AM

Description

Data Sourced

via NVD·02:15 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2025-54336?

CVE-2025-54336 has been identified as a critical vulnerability due to its potential for allowing unauthorized administrative access.

How do I fix CVE-2025-54336?

To mitigate CVE-2025-54336, update Plesk Obsidian to version 18.0.71 or later as recommended by Plesk.

What product versions are affected by CVE-2025-54336?

CVE-2025-54336 specifically affects Plesk Obsidian version 18.0.70.

What type of vulnerability is CVE-2025-54336?

CVE-2025-54336 is classified as an authentication bypass vulnerability.

Can CVE-2025-54336 be exploited remotely?

Yes, CVE-2025-54336 can be exploited remotely, allowing attackers to gain admin access without a valid password.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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