Unauthenticated PHP Object Injection in WP Activity Log by WP Security Audit Log
CVE-2026-54806

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
WP Activity Log
Vendor
CVE Published:
17 June 2026

What is CVE-2026-54806?

The WP Activity Log plugin for WordPress versions up to 5.6.3.1 is susceptible to an unauthenticated PHP Object Injection vulnerability. This flaw allows attackers to exploit the application by injecting malicious PHP objects, potentially leading to undesirable operations on the system. As a result, unauthorized users could gain access to sensitive operations or data without any form of authentication, posing a significant security risk to WordPress sites utilizing this plugin.

Affected Version(s)

WP Activity Log <= 5.6.3.1

References

https://patchstack.com/database/wordpress/plugin/wp-secur...
vdb-entry

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daroo | Patchstack Bug Bounty Program
.