CVE-2025-6851 Broken Link Notifier <= 1.3.0 - Unauthenticated Server-Side Request Forgery
Unauthenticated attackers can exploit Broken Link Notifier to perform Server-Side Request Forgery, accessing internal services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-6851?
CVE-2025-6851 is a high-severity server-side request forgery vulnerability in apos37 Broken Link Notifier, published on 11 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
Weakness: CWE-918
Which versions are affected by CVE-2025-6851?
It affects 1 product.
Products include Pluginrx Broken Link Notifier.
How do I fix CVE-2025-6851?
No fix has been published for CVE-2025-6851 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2025-6851 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6851 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-x4vc-m5g5-663m.