CVE-2026-84907 Eventin < 4.1.24 - Unauthenticated Order and Attendee Status Reset via Payment REST Endpoint
Unauthenticated attackers can reset paid Eventin orders to pending status via a REST endpoint when offline payments are enabled, invalidating tickets.
- 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-2026-84907?
CVE-2026-84907 is a low-severity missing authorization vulnerability in Unknown Eventin, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Eventin WordPress plugin before 4.1.24 does not properly authorise order finalisation when its offline (local) payment method is enabled, relying on a nonce that is exposed to unauthenticated visitors and never checking that the caller owns the order, allowing unauthenticated attackers to reset any existing order and its attendees to a pending state and thereby invalidate paid tickets.
Weakness: CWE-862
Which versions are affected by CVE-2026-84907?
How do I fix CVE-2026-84907?
No fix has been published for CVE-2026-84907 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84907 being exploited?
There is no known exploitation of CVE-2026-84907 in the wild and no public exploit code.
Sources
Also known as GHSA-8p9w-4xhq-w374.