CVE-2026-2126 Missing authorization in User Submitted Posts – Enable Users to Submit Posts from the Front End
Unauthenticated attackers can bypass category restrictions to assign posts to arbitrary categories in the User Submitted Posts WordPress plugin.
- 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-2026-2126?
CVE-2026-2126 is a medium-severity missing authorization vulnerability in specialk User Submitted Posts – Enable Users to Submit Posts from the Front End, published on 18 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The User Submitted Posts – Enable Users to Submit Posts from the Front End plugin for WordPress is vulnerable to Incorrect Authorization in all versions up to, and including, 20260113. This is due to the `usp_get_submitted_category()` function accepting user-submitted category IDs from the POST body without validating them against the admin-configured allowed categories stored in `usp_options['categories']`. This makes it possible for unauthenticated attackers to assign submitted posts to arbitrary categories, including restricted ones, by crafting a direct POST request with manipulated `user-submitted-category[]` values, bypassing the frontend category restrictions.
Weakness: CWE-863
Which versions are affected by CVE-2026-2126?
How do I fix CVE-2026-2126?
No fix has been published for CVE-2026-2126 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-2026-2126 being exploited?
There is no known exploitation of CVE-2026-2126 in the wild and no public exploit code.
Sources
Also known as GHSA-pm8v-w3f2-2hxx.