CVE-2026-54806

WordPress WP Activity Log plugin <= 5.6.3.1 - PHP Object Injection vulnerability

Published Jun 17, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 versions.

Remediation

Vendor Solution

Update the WordPress WP Activity Log Plugin to the latest available version (at least 5.6.4).

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Melapress
Melapress wp Activity Log
Wordpress
Wordpress wordpress
Vendors & Products Melapress
Melapress wp Activity Log
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Description Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 versions.
Title WordPress WP Activity Log plugin <= 5.6.3.1 - PHP Object Injection vulnerability
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Patchstack
Published
Updated
Jun 17, 2026, 3:29 PM
Reserved
Jun 16, 2026, 9:21 AM
Status
Deferred
Published
Jun 17, 2026, 1:20 PM
Modified
Oct 26, 2026, 12:10 AM