# CVE-2026-3239: WPChill Strong Testimonials Stored XSS in testimonial_view shortcode

Source: https://junglewise.ai/threats/cve-2026-3239-wpchill-strong-testimonials-stored-xss-in-testimonial-view  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-3239 · Severity: medium · CVSS 6.4 · Published 2026-04-08

Strong Testimonials is a popular WordPress plugin used to display customer reviews and feedback on websites. A security flaw allows users with basic contributor-level access to embed malicious scripts into testimonial pages. When other visitors or administrators view these pages, the scripts could execute, potentially leading to unauthorized actions or the theft of sensitive session information.

Vendors: [WPChill](https://junglewise.ai/threats/vendors/wpchill).

## Quick answers

**Is CVE-2026-3239 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3239 being exploited in the wild.

**How severe is CVE-2026-3239?** Medium severity, with a CVSS score of 6.4, published 8 April 2026.

**Which products and versions are affected?** WPChill Strong Testimonials <= 3.2.21.

**Is there a fix for CVE-2026-3239?** 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-2026-3239 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-3239?** Check whether you run WPChill Strong Testimonials 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 Strong Testimonials plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on user-supplied attributes within the 'testimonial_view' shortcode. This vulnerability affects all versions up to and including 3.2.21. An authenticated attacker with contributor-level permissions or higher can exploit this by injecting arbitrary web scripts into pages. Because the scripts are stored on the server, they execute in the context of any user's browser who views the compromised page. A patch appears to have been addressed in changeset 3470120.

## Affected products

- WPChill Strong Testimonials <= 3.2.21

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: advisory

## References

- [https://plugins.trac.wordpress.org/changeset/3470120/strong-testimonials](https://plugins.trac.wordpress.org/changeset/3470120/strong-testimonials)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/88d769cd-bea8-42e4-80a8-a77c0699b50c?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/88d769cd-bea8-42e4-80a8-a77c0699b50c?source=cve)