8.1

CVE-2026-12720: unknown kirki Deserialization of Untrusted Data

CVSS: 8.1v3.1HighDeferred
Published 31-07-2026Last modified 31-07-2026
Open JSON

Vulnerability summary

CVE-2026-12720 is a high (CVSS 8.1) Deserialization of Untrusted Data vulnerability in unknown kirki. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.3% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 6.0.13.

Overall risk
43/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (wordfence)
EPSS score
0.53%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 31-07-2026
    PublishedVulnerability first disclosed.
  2. 31-07-2026
    Last modifiedVulnerability information updated.

Description

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 With a suitable gadget chain present on the site (via another installed Kirki WordPress plugin before 6.0.13, , or an outdated WordPress version), this could be leveraged to perform a variety of attacks, such as remote code execution.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

+0.15 pp

From 0.38% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Unknown1 product
Wordpress1 product
  • kirki< 6.0.13

2 vendors · 2 products

References

2 links