CVE-2026-81431 Registration Form for WooCommerce 1.1.0 - 1.1.2 - Contributor+ Privilege Escalation via Unvalidated tgwcfb_id
Contributors can escalate privileges to Administrator by exploiting unvalidated form IDs during registration, leading to full site takeover.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81431?
CVE-2026-81431 is a high-severity vulnerability in Unknown Registration Form for WooCommerce, published on 10 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Registration Form for WooCommerce WordPress plugin before 1.1.3 does not validate that the form referenced during registration is a legitimate registration form, reading the permitted-role allow-list from an arbitrary attacker-controlled post instead. A user able to create a post (Contributor and above) can therefore register a new account with an arbitrary role, including Administrator, leading to full site takeover. This is an incomplete fix of CVE-2026-54807.
Weakness: CWE-269
Which versions are affected by CVE-2026-81431?
How do I fix CVE-2026-81431?
No fix has been published for CVE-2026-81431 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-81431 being exploited?
There is no known exploitation of CVE-2026-81431 in the wild and no public exploit code.
Sources
Also known as GHSA-rg35-vr3j-6cfx.