Unauthenticated PHP Object Injection in Ajax Search Lite by WordPress
CVE-2026-28139

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Ajax Search Lite
Vendor
CVE Published:
6 August 2026

What is CVE-2026-28139?

An unauthenticated PHP Object Injection vulnerability exists in the Ajax Search Lite plugin for WordPress, which affects versions up to 4.14.4. This vulnerability allows attackers to exploit the application by injecting malicious objects, potentially leading to arbitrary code execution or data disclosure. Implementing security measures and updating to a secure version are essential to protect against such threats.

Affected Version(s)

Ajax Search Lite <= 4.14.4

References

https://patchstack.com/database/wordpress/plugin/ajax-sea...
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

hhhai | Patchstack Bug Bounty Program
.