CVE-2025-54336CRITICAL 9.8EPSS p37.3%

CVE-2025-54336CVE-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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.47% probability of exploitation · percentile 37.3% · 2026-06-18T12:00:27Z
Published2025-08-19
Last modified2026-04-15

Underlying weaknesses· 1

CWE-697

References

  1. https://blog.aziz.tn/2025/08/cve-2025-54336.html/
  2. https://support.plesk.com/hc/en-us/articles/33785727869847-Vulnerability-CVE-2025-54336
  3. https://www.plesk.com/blog/plesk-news-announcements/introducing-plesk-obsidian-18-0-70-anniversary-edition/

1

TypeTargetConfidenceTier
WeaknessIncorrect Comparisoncwe-6970%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.