CVE-2026-3601User Registration & Membership <= 5.1.4 - Missing Authorization to Authenticated (Contributor+) Limited Page Content Modification
- 4.3MediumCVSS base score
- 0.30%Exploitation in 30 daysEPSS · top 77% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit.
Timeline
ID reserved
By Wordfence
- 2 months later
· 2 months later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.30% · top 77% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
References
References6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74bb4a5091?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php#L1003 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php#L1003 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin-assets.php#L370 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-admin-assets.php#L370 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-ajax.php?contextall=1 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-27241 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-3601)Record last updated .