Vulnerability Description
The Kirki plugin for WordPress is vulnerable to Privilege Escalation via PHP Object Injection in all versions up to, and including, 6.2.5 via deserialization of untrusted input through the 'get-single-symbol' branch of the kirki_post_apis() AJAX dispatcher due to a missing capability check. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to overwrite an administrator's password and gain administrative access.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/changeset/3677965/kirki
- https://www.wordfence.com/threat-intel/vulnerabilities/id/aecfea73-97fc-48c3-bf1
FAQ
What is CVE-2026-75891?
CVE-2026-75891 is a vulnerability with a CVSS score of 8.8 (HIGH). The Kirki plugin for WordPress is vulnerable to Privilege Escalation via PHP Object Injection in all versions up to, and including, 6.2.5 via deserialization of untrusted input through the 'get-single...
How severe is CVE-2026-75891?
CVE-2026-75891 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-75891?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.