User Submitted Posts <= 20260113 — Incorrect Authorization to Unauthenticated Category Restriction Bypass via 'user-submitted-category' Parameter
CVE-2026-2126Published · Updated Action summary
Affected: ≤20260113Update to 20260217 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-863 Incorrect Authorization
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
User Submitted Posts – Enable Users to Submit Posts from the Front End user-submitted-posts
- Affected≤ 20260113
- Patched in20260217
Update to 20260217 or newer.
You are affected if you run ≤ 20260113. Version 20260217 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under User Submitted Posts – Enable Users to Submit Posts from the Front End.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 20260217, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch User Submitted Posts – Enable Users to Submit Posts from the Front End to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to type5afe.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in User Submitted Posts – Enable Users to Submit Posts from the Front End
All 15| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored DOM-Based Cross-Site Scripting via 'user-submitted-content' Parameter via Block-Comment Shortcode Splitting ≤20260916Update to 20261029 | CVE-2026-119162 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤20260810Update to 20260916 | CVE-2026-62084 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤20260607Update to 20260608 | CVE-2026-11570 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Custom Field ≤20251210Update to 20260110 | CVE-2026-0800 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'usp_access' Shortcode ≤20260110Update to 20260113 | CVE-2026-0913 |
- High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via 'user-submitted-content' Parameter via Block-Comment Shortcode Splitting
≤20260916Update to 20261029
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤20260810Update to 20260916
- High7.2Unauthenticated Stored Cross-Site Scripting
≤20260607Update to 20260608
- High7.2Unauthenticated Stored Cross-Site Scripting via Custom Field
≤20251210Update to 20260110
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'usp_access' Shortcode
≤20260110Update to 20260113
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.