Strong Testimonials <= 3.3.12 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Form Preview
- ID
- WPSEC-2026-0906
- Plugin
- Strong Testimonials (strong-testimonials)
- Affected
- all versions before 3.3.13
- Remediation
- Update to 3.3.13 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- Weakness
- CWE-94
- Usage
- Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-10-14
- Attack surface
- Strong Testimonials on WPSec AttackSurface
- Fix released
- Published
Description
The Strong Testimonials plugin for WordPress is vulnerable to Arbitrary Shortcode Execution via the 'wpmtst_get_form_preview' AJAX action in all versions up to, and including, 3.3.12. This is due to a missing capability check: the handler only verifies the 'wpmtst-admin' nonce, which the plugin prints on every admin page for every logged-in user, and it then renders user-supplied field definitions, passing the 'shortcode_on_form' value to do_shortcode() and an 'action_input' value to do_action(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to execute arbitrary shortcodes and trigger arbitrary action hooks.
References
- https://wpsec.com/vuln/WPSEC-2026-0906/
- https://plugins.svn.wordpress.org/strong-testimonials/tags/3.3.13/
- https://wordpress.org/plugins/strong-testimonials/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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