Stored Cross-Site Scripting Vulnerability in Client Testimonial Slider Plugin for WordPress
CVE-2026-2716

4.4MEDIUM

Key Information:

Vendor

WordPress
Status
Client Testimonial Slider
Vendor
CVE Published:
19 February 2026

What is CVE-2026-2716?

The Client Testimonial Slider plugin for WordPress is susceptible to Stored Cross-Site Scripting (XSS) due to inadequate input validation and output encoding in the 'Testimonial Heading' setting. This vulnerability impacts all versions up to and including 2.0, particularly affecting multi-site setups or those with unfiltered_html disabled. Authenticated users with Administrator-level access can exploit this flaw to inject malicious scripts, which execute when other users access the compromised pages, potentially leading to unauthorized activity or data breaches.

Affected Version(s)

Client Testimonial Slider 0 <= 2.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/wp-client-test...
https://plugins.trac.wordpress.org/browser/wp-client-test...

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Nur Ibnu Hubab
.