# CVE-2025-66150: Merkulove Appender missing authorization in access control

Source: https://junglewise.ai/threats/cve-2025-66150-merkulove-appender-missing-authorization-in-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-31. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2025-66150 · Severity: medium · CVSS 5.4 · Published 2025-12-31

Appender is a WordPress plugin used to manage and display content on websites. A missing authorization vulnerability allows users with Subscriber-level access to perform actions and view data they should not be permitted to access, potentially exposing private or restricted content to unauthorized parties.

Vendors: [Merkulove](https://junglewise.ai/threats/vendors/merkulove).

## Quick answers

**Is CVE-2025-66150 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-66150 being exploited in the wild.

**How severe is CVE-2025-66150?** Medium severity, with a CVSS score of 5.4, published 31 December 2025.

**Which products and versions are affected?** Merkulove Appender <= 1.1.1.

**Is there a fix for CVE-2025-66150?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-66150 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2025-66150?** Check whether you run Merkulove Appender 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.

## Technical details

The Appender WordPress plugin version 1.1.1 and earlier contains a broken access control vulnerability (CWE-284) where authorization checks are either missing or incorrectly configured. An attacker with Subscriber-level privileges can exploit this to access pages, perform administrative actions, or view data that should be restricted to higher privilege levels. The vulnerability is network-accessible via the WordPress front-end and requires only a standard user account to exploit. No official patch is currently available as of the disclosure date.

## Affected products

- Merkulove Appender <= 1.1.1

## Timeline

- 2025-11-10: disclosed: Reported by Phat RiO
- 2025-12-31: advisory: Published by Patchstack

## References

- [https://elements.envato.com/](https://elements.envato.com/)
- [https://patchstack.com/database/Wordpress/Plugin/appender/vulnerability/wordpress-appender-plugin-1-1-1-broken-access-control-vulnerability?_s_id=cve](https://patchstack.com/database/Wordpress/Plugin/appender/vulnerability/wordpress-appender-plugin-1-1-1-broken-access-control-vulnerability?_s_id=cve)