CVE-2026-16258 — CRITICAL (9.8)

Vulnerability Description

The Ajax Search Lite WordPress plugin before 4.14.5 does not prevent the deserialization of untrusted input, allowing unauthenticated attackers to perform PHP Object Injection. When a suitable POP chain is present via another installed Ajax Search Lite WordPress plugin before 4.14.5 or , this can be leveraged to achieve Remote Code Execution.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-502

References

https://wpscan.com/vulnerability/8487a2ce-cb4d-46b8-942e-334ac94cf115/

FAQ

What is CVE-2026-16258?

CVE-2026-16258 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The Ajax Search Lite WordPress plugin before 4.14.5 does not prevent the deserialization of untrusted input, allowing unauthenticated attackers to perform PHP Object Injection. When a suitable POP ch...

How severe is CVE-2026-16258?

CVE-2026-16258 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-16258?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.