# CVE-2026-42694: Themeum Kirki cross-site scripting vulnerability in HTML tag handling

Source: https://junglewise.ai/threats/cve-2026-42694-improper-neutralization-of-script-related-html-tags-in-a-web-page  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-29. Updated: 2026-10-29  
License: CC BY 4.0 with a link back

CVE-2026-42694 · Severity: medium · CVSS 4.3 · Published 2026-10-29

Kirki is a customization framework for WordPress themes that allows developers to add settings panels. A cross-site scripting (XSS) vulnerability in the plugin allows attackers with subscriber-level access to inject malicious scripts that execute in the browsers of other users, potentially compromising site data and administration capabilities.

Technologies: [Themeum Kirki](https://junglewise.ai/threats/technologies/kirki). Vendors: [Themeum](https://junglewise.ai/threats/vendors/themeum).

## Quick answers

**Is CVE-2026-42694 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42694 being exploited in the wild.

**How severe is CVE-2026-42694?** Medium severity, with a CVSS score of 4.3, published 29 October 2026.

**Which products and versions are affected?** Themeum Kirki through 6.4.0.

**Is there a fix for CVE-2026-42694?** Yes: fixed in 6.4.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-42694 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-42694?** Check whether you run Themeum Kirki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.4.1

## Technical details

A content injection vulnerability exists in the improper neutralization of script-related HTML tags. An authenticated attacker with subscriber privileges can inject arbitrary HTML and scripts into pages; the vulnerability affects Kirki versions up to 6.4.0 and is fixed in 6.4.1.

## Affected products

- Themeum Kirki through 6.4.0

## Timeline

- 2026-10-29: disclosed
- 2026-10-29: patched

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/kirki/vulnerability/wordpress-kirki-plugin-6-4-0-content-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/kirki/vulnerability/wordpress-kirki-plugin-6-4-0-content-injection-vulnerability?_s_id=cve)

## Related threats

- [Kirki reCAPTCHA bypass in form submission](https://junglewise.ai/threats/cve-2026-112348-kirki-plugin-for-wordpress-before-6-2-5-contains-a-recaptcha)
- [Kirki page builder broken object-level access control in REST API](https://junglewise.ai/threats/cve-2026-112347-kirki-plugin-for-wordpress-before-6-4-1-contains-a-broken-object)
- [Themeum Kirki arbitrary code execution in input validation](https://junglewise.ai/threats/cve-2026-103065-improper-validation-of-specified-quantity-in-input-vulnerability)
- [Themeum Kirki arbitrary file deletion in Editor component](https://junglewise.ai/threats/cve-2026-65436-themeum-kirki-arbitrary-file-deletion-in-editor-component)
- [Themeum Kirki missing authorization in access control](https://junglewise.ai/threats/cve-2026-57727-themeum-kirki-missing-authorization-in-access-control)