CVE-2025-6851
Published: 11 July 2025
Summary
CVE-2025-6851 is a high-severity SSRF (CWE-918) vulnerability in Pluginrx Broken Link Notifier. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 14.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The Broken Link Notifier plugin for WordPress is vulnerable to server-side request forgery in all versions through 1.3.0. The flaw exists in the ajax_blinks() function, which invokes check_url_status_code() and permits an attacker to supply arbitrary URLs that the application will then fetch.
Unauthenticated attackers can exploit the issue over the network to issue requests from the WordPress server to internal or external resources. Successful exploitation allows the attacker to query or modify data accessible to the application, corresponding to a CVSS 7.2 rating that reflects the change in scope and the combination of confidentiality and integrity impact without requiring authentication.
The referenced Wordfence advisory and the WordPress plugin changeset indicate that a fix has been published in the plugin repository; site administrators should apply the update that addresses the vulnerable ajax_blinks() code path. The EPSS score remains flat at 0.0248 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21125
Vulnerability details
The Broken Link Notifier plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.3.0 via the ajax_blinks() function which ultimately calls the check_url_status_code() function. This makes it possible for unauthenticated attackers to make…
more
web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing attempts server-side requests to internal resources, identifying SSRF weaknesses for remediation.
Outbound connections to external resources can be monitored and limited at the boundary, reducing SSRF impact.
Validates server-side URLs and resource references to block SSRF attempts.
Detects server-side request forgery through monitoring of unexpected outbound connections.