CVE-2026-73481 phpList < 3.7.0-RC5 Cross-Site Request Forgery via Bounce Rules
An attacker can trick an authenticated administrator into deleting arbitrary bounce rules via a crafted GET request due to missing CSRF validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-73481?
CVE-2026-73481 is a medium-severity vulnerability in phplist3, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
phpList before 3.7.0-RC5 fail to enforce CSRF token validation on the bounce rule deletion endpoint (bouncerules.php / bouncerule.php). The deletion is performed via a GET request (?page=bouncerules&del=N), and the central CSRF check (verifyCsrfGetToken) is invoked with enforce=false, so it only validates the token when a 'tk' parameter is present. A remote attacker can trick an authenticated administrator into loading a crafted URL (e.g., embedded in an image tag) to delete arbitrary bounce rules from the phplist_bounceregex table without a valid CSRF token.
Weakness: CWE-352
Which versions are affected by CVE-2026-73481?
How do I fix CVE-2026-73481?
No fix has been published for CVE-2026-73481 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-73481 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73481 exists.
Sources
Also known as GHSA-328j-qh6x-vvjq.