# Testimonial Slider <= 3.0.2 - Authenticated (Subscriber+) Missing Authorization to Post Menu Order Modification

- **ID:** WPSEC-2026-2874
- **Plugin:** Testimonial – Testimonial Slider and Showcase Plugin (`testimonial-slider-and-showcase`), https://wordpress.org/plugins/testimonial-slider-and-showcase/
- **Affected versions:** from 2.0.0 before 3.0.3
- **Fixed in:** 3.0.3 (Update to 3.0.3 or later.)
- **Severity:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-12)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/testimonial-slider-and-showcase
- **Fix released:** 2026-11-10
- **Published:** 2026-11-12
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2874/

## Description

The Testimonial plugin for WordPress is vulnerable to unauthorized modification of data via the tss-update-menu-order AJAX action in all versions up to, and including, 3.0.2, due to a missing capability check on the update_menu_order() function. This makes it possible for authenticated attackers, with subscriber-level access and above, to reorder the menu_order values of arbitrary posts.

## References

- https://wpsec.com/vuln/WPSEC-2026-2874/
- https://plugins.svn.wordpress.org/testimonial-slider-and-showcase/tags/3.0.3/
- https://wordpress.org/plugins/testimonial-slider-and-showcase/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2874/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.