Stored Cross-Site Scripting Vulnerability in Client Testimonial Slider Plugin for WordPress
CVE-2025-13897

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Client Testimonial Slider
Vendor
CVE Published:
9 January 2026

What is CVE-2025-13897?

The Client Testimonial Slider plugin for WordPress contains a vulnerability that allows authenticated users with Contributor-level access or higher to exploit a stored cross-site scripting (XSS). This vulnerability arises from inadequate input sanitization and insufficient output escaping of user-supplied attributes in the 'aft_testimonial_meta_name' custom field within the Client Information metabox. Attackers can inject malicious scripts into the administrative pages, leading to potential web application exploits whenever the page is accessed by other users.

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:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Yudha - DJ
.