CVE-2026-2126: Specialk User Submitted Posts – Enable Users To Submit Posts From The Front End

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Specialk User Submitted Posts – Enable Users To Submit Posts From The Front End: up to and including 20260113

Published 2026-02-18. Last modified 2026-06-17.