CVE-2025-24660
Published: 03 February 2025
Summary
CVE-2025-24660 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 17.7th 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-2025-24660 is a reflected cross-site scripting (XSS) vulnerability stemming from improper neutralization of input during web page generation in the WordPress plugin Simple Membership Custom Messages (simple-membership-custom-messages, also referenced as wp.insider Simple Membership Custom Messages). The issue affects all versions of the plugin up to and including 2.4 and is classified under CWE-79 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). It was published on 2025-02-03.
Unauthenticated attackers can exploit this vulnerability remotely with low complexity by tricking users into interacting with maliciously crafted links or inputs that reflect executable scripts back in the web page. Exploitation requires user interaction, such as clicking a link, but changes the scope to the victim's browser context, potentially allowing limited impacts like low-level disclosure of sensitive data in cookies or session tokens, minor integrity modifications, or restricted denial of service.
The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/simple-membership-custom-messages/vulnerability/wordpress-simple-membership-custom-messages-plugin-2-4-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve provides further details on the vulnerability in Simple Membership Custom Messages version 2.4.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-3855
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wp.insider Simple Membership Custom Messages simple-membership-custom-messages allows Reflected XSS.This issue affects Simple Membership Custom Messages: from n/a through <= 2.4.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly maps to T1190 (exploiting public-facing app); exploitation via crafted malicious links that require user interaction maps to T1204.001.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly addresses reflected XSS by filtering malicious scripts from web page outputs generated from untrusted user inputs in the WordPress plugin.
Validates and sanitizes untrusted inputs before processing and reflection in web pages, preventing injection of executable scripts.
Ensures timely remediation of the specific flaw in Simple Membership Custom Messages plugin versions up to 2.4, eliminating the vulnerability root cause.