CVE-2025-13897 is a stored cross-site scripting vulnerability in the Client Testimonial Slider WordPress plugin (amu02aftab project), affecting all versions up to and including 2.0. The issue is due to improper neutralization of input during web page generation (CWE-79) specifically in the 'aft_testimonial_meta_name' custom field within the Client Information metabox. Authenticated users with Contributor or higher privileges can inject arbitrary scripts that execute in the context of administrative pages, potentially leading to session hijacking or other script-based attacks. The vulnerability has a CVSS 3.1 score of 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), indicating network attack vector, low attack complexity, requiring privileges, no user interaction, scope changed, with low confidentiality and integrity impact and no availability impact.

An attacker with Contributor-level or higher access can inject persistent malicious scripts into administrative pages via the vulnerable custom field. This can lead to unauthorized script execution in the context of users viewing the injected pages, potentially compromising user sessions or performing actions with the victim's privileges. The confidentiality and integrity impacts are rated low, and availability is unaffected. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Client Testimonial Slider plugin if possible. Monitor for updates from the plugin vendor or WordPress security advisories to apply an official fix once released.