What is CVE-2026-12720?

CVE-2026-12720 is a high-severity vulnerability in Kirki, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2026-07-31.

How severe is CVE-2026-12720?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2026-12720 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Kirki

CVE-2026-12720

The Kirki WordPress plugin before 6.0.13 does not restrict which classes may be instantiated when it deserialises data that unauthenticated users can store, leading to PHP Object Injection that is triggered when an administrator later reviews the stored data. With a suitable gadget chain present on the site (via another installed Kirki WordPress plugin before 6.0.13, , or an outdated WordPress version), this could be leveraged to perform a variety of attacks, such as remote code execution.

Vulnerability class: Insecure Deserialization

EPSS: 0.004 (31.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Unknown Kirki — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

webshellseo8/CVE-2026-12720-Proof-of-Concept

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-12720?: CVE-2026-12720 is a high-severity vulnerability in Kirki, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2026-07-31.
How severe is CVE-2026-12720?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2026-12720 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.