CVE-2025-25139
Published: 07 February 2025
Summary
CVE-2025-25139 is a high-severity CSRF (CWE-352) 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 28.9th 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 SC-23 (Session Authenticity) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-25139 is a Cross-Site Request Forgery (CSRF) vulnerability in the WP Custom Post RSS Feed plugin developed by Cynob IT Consultancy for WordPress. The flaw enables Stored XSS and affects all versions of the plugin from its initial release through 1.0.0.
Attackers require no privileges and can exploit this over the network with low attack complexity, though user interaction is needed. Successful exploitation changes the security scope and results in low impacts to confidentiality, integrity, and availability, yielding a CVSS v3.1 base score of 7.1. An unauthenticated adversary can trick an authenticated user, such as an administrator, into performing a state-changing action via a forged request, leading to the storage of malicious XSS payloads that execute for subsequent visitors.
Patchstack advisories detail this CSRF-to-Stored XSS vulnerability in WP Custom Post RSS Feed version 1.0.0, urging WordPress administrators to review the plugin's status and apply recommended mitigations.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-4050
Vulnerability details
Cross-Site Request Forgery (CSRF) vulnerability in Cynob IT Consultancy WP Custom Post RSS Feed wp-custom-post-rss-feed allows Stored XSS.This issue affects WP Custom Post RSS Feed: from n/a through <= 1.0.0.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CSRF-to-Stored XSS in public-facing WordPress plugin directly enables exploitation of public-facing applications (T1190) and attacker-controlled JavaScript execution in victim browsers (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 mandates timely remediation of security flaws like CVE-2025-25139 by patching or removing the vulnerable WP Custom Post RSS Feed plugin.
SC-23 enforces session authenticity mechanisms such as anti-CSRF tokens to block forged requests that store malicious XSS payloads.
SI-10 requires validation of information inputs to reject malicious XSS payloads injected via the CSRF vulnerability.