CVE-2026-2126
User Submitted Posts <= 20260113 - Incorrect Authorization to Unauthenticated Category Restriction Bypass via 'user-submitted-category' Parameter
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
User Submitted Posts <= 20260113 - Incorrect Authorization to Unauthenticated Category Restriction Bypass via 'user-submitted-category' Parameter
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.
- Record
CVE-2026-2126- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
EUVDEUVD-2026-8042
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.
- Record
EUVD-2026-8042- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-pm8v-w3f2-2hxx
The User Submitted Posts – Enable Users to Submit Posts from the Front End plugin for WordPress...
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.
- Record
GHSA-pm8v-w3f2-2hxx- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-2126- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-2126 is a medium vulnerability (CVSS 5.3) in Specialk User Submitted Posts – Enable Users To Submit Posts From The Front End, published February 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. No source names a fixed version.
References
wordfence.com/threat-intel/vulnerabilities/id/02c5e3ad-5cc3-40b1-a15a-10d53383abe6?source=cve
plugins.trac.wordpress.org/browser/user-submitted-posts/tags/20260113/user-submitted-posts.php
nvd.nist.gov/vuln/detail/CVE-2026-2126
github.com/advisories/GHSA-pm8v-w3f2-2hxx