What’s Vulnerable › Vulnerabilities

CVE-2026-92622: Strong Testimonials <= 3.3.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'lightbox_class' Shortcode Attribute

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-18
• Weakness: CWE-79

Description

The Strong Testimonials plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'lightbox_class' Shortcode Attribute in all versions up to, and including, 3.3.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the targeted testimonial view has at least one published testimonial with a featured image and the lightbox wrapper enabled, as the vulnerable code path is only reached when a thumbnail is rendered.

Affected products

• WP Chill Strong Testimonials: through 3.3.8

References

• https://plugins.trac.wordpress.org/browser/strong-testimonials/tags/3.3.8/includes/class-strong-testimonials-render.php#L723
• https://plugins.trac.wordpress.org/browser/strong-testimonials/tags/3.3.8/includes/class-strong-testimonials-view-shortcode.php#L60
• https://plugins.trac.wordpress.org/browser/strong-testimonials/tags/3.3.8/includes/functions-image.php#L70
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3699887%40strong-testimonials&new=3699887%40strong-testimonials
• https://www.wordfence.com/threat-intel/vulnerabilities/id/52a92e3c-cb64-4fc5-9248-6f4fc2a6a3cc?source=cve

Get alerted when CVE-2026-92622 or the next vulnerability affects your stack