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TI-2026-81022 Aliases CVE-2026-75891GHSA-ppv3-rhmr-8mqr

PHP object injection in Kirki plugin lets subscribers take over admins

Priority MEDIUM 40CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

The Kirki plugin for WordPress by themeum is affected in all versions through 6.2.5. A missing capability check lets the 'get-single-symbol' AJAX branch deserialize untrusted input, which is CWE-502 (Deserialization of Untrusted Data). An authenticated attacker with Subscriber-level access or higher can inject a PHP object and, through a POP chain, overwrite an administrator's password to gain administrative access.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00305 23rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
themeumKirki – Freeform Page Builder, Website Builder & Customizerup to 6.2.5—No fix listedCNA
  • Kirki – Freeform Page Builder, Website Builder & Customizer Vendorthemeum Affected up to 6.2.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Kirki (Freeform Page Builder, Website Builder & Customizer).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-75891
  2. 2026-10-27 Alias added: GHSA-ppv3-rhmr-8mqr
  3. 2026-10-27 Priority changed: MEDIUM → LOW
  4. 2026-10-29 CISA SSVC decision points changed
  5. 2026-10-29 Priority changed: LOW → MEDIUM

References

Other 2

  • TI-2024-09629 Tutor LMS <= 2.7.6 - Unauthenticated SQL Injection via rating_filter CVSS 3.1HIGH 7.5
  • TI-2023-02936 Tutor LMS < 2.2.1 - Unauthenticated Access to Tutor LMS Lesson Resources via REST API CVSS 3.1HIGH 7.5
  • TI-2021-07196 Qubely < 1.8.6 - Unauthenticated Arbitrary E-mail Sending CVSS 3.1HIGH 7.5
  • TI-2023-05666 WP Crowdfunding < 2.1.9 - Reflected XSS CVSS 3.1MEDIUM 6.1
  • TI-2023-00225 Tutor LMS < 2.0.10 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
  • TI-2023-04422 Tutor LMS < 2.3.0 - Subscriber+ Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4
See all 171 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences