# CVE-2026-103065: Themeum Kirki arbitrary code execution in input validation

Source: https://junglewise.ai/threats/cve-2026-103065-improper-validation-of-specified-quantity-in-input-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-03. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-103065 · Severity: high · CVSS 8.2 · Published 2026-10-03

Kirki is a WordPress plugin that manages theme customization settings. An improper validation vulnerability allows unauthenticated attackers to execute arbitrary code on affected websites, giving them complete server compromise and control over the site's content and data.

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

## Quick answers

**Is CVE-2026-103065 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103065 being exploited in the wild.

**How severe is CVE-2026-103065?** High severity, with a CVSS score of 8.2, published 3 October 2026.

**Which products and versions are affected?** Themeum Kirki up to 6.3.1.

**Is there a fix for CVE-2026-103065?** Yes: fixed in 6.3.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-103065 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-103065?** 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 6.3.2

## Technical details

The vulnerability involves improper validation of input quantities that fails to properly constrain access control, allowing attackers to bypass ACLs and inject code. This affects Kirki versions up to 6.3.1 and is exploitable remotely without authentication. An attacker gains arbitrary code execution on the server.

## Affected products

- Themeum Kirki up to 6.3.1

## Timeline

- 2026-10-03: disclosed
- 2026-10-01: patched

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/kirki/vulnerability/wordpress-kirki-plugin-6-3-1-arbitrary-code-execution-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/kirki/vulnerability/wordpress-kirki-plugin-6-3-1-arbitrary-code-execution-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 cross-site scripting vulnerability in HTML tag handling](https://junglewise.ai/threats/cve-2026-42694-improper-neutralization-of-script-related-html-tags-in-a-web-page)
- [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)