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

Badges

👾 Exploit Exists🟡 Public PoC

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

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-54806
Created by joshuavanderpoll

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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

daroo | Patchstack Bug Bounty Program
.