CVE-2025-15396
Published: 02 February 2026
Summary
CVE-2025-15396 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 5.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2025-15396 is a reflected cross-site scripting (XSS) vulnerability in the Library Viewer WordPress plugin versions prior to 3.2.0. The flaw arises because the plugin fails to properly sanitize and escape certain parameters before outputting them back in web pages, allowing malicious scripts to be injected and executed in a user's browser. It is classified under CWE-79 (Cross-Site Scripting) with a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating high severity due to its network accessibility and potential scope change.
Attackers can exploit this vulnerability remotely without authentication by crafting malicious URLs containing XSS payloads and tricking targeted users—particularly high-privilege administrators—into interacting with them, such as by clicking a link or visiting a malicious page. Successful exploitation executes arbitrary JavaScript in the victim's browser context, potentially enabling session hijacking, theft of sensitive data like admin credentials, or further actions like modifying site content, depending on the victim's permissions.
Mitigation involves updating the Library Viewer WordPress plugin to version 3.2.0 or later, where the sanitization issue is addressed. Additional details are available in the WPScan advisory at https://wpscan.com/vulnerability/08790e11-019d-4680-a75f-ee0a937f8cc8/.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-206615
Vulnerability details
The Library Viewer WordPress plugin before 3.2.0 does not sanitise and escape some parameters before outputting them back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables remote exploitation (T1190) and arbitrary JavaScript execution in victim browser (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of untrusted input parameters before they are processed or reflected in output, which is the root cause of this reflected XSS flaw.
Requires filtering or encoding of information before it is output to users, directly mitigating the missing escaping of plugin parameters that enables script injection.
Provides mechanisms to detect and block malicious code (including reflected script payloads) delivered via crafted URLs before execution in the browser.