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.
CVE-2026-3601
Score 4.3 from GitHub Security Advisory published 2026-05-05. NVD baseline CVSS 4.3; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.3
- EG Score
- 4.3(medium)
- EPSS
- 22.1%
- KEV
- Not listed
Published
May 5, 2026
Last Modified
May 5, 2026
References (6)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-admin-assets.php#L370
- security@wordfencehttps://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php#L1003
- security@wordfencehttps://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin-assets.php#L370
- security@wordfencehttps://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php#L1003
- security@wordfencehttps://plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-ajax.php?contextall=1
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74bb4a5091?source=cve
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 35× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-21 15:24 UTCEPSS rescore
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- 2026-06-14 07:58 UTCGHSA enrichment
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- 2026-06-01 13:52 UTCEPSS rescore
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- 2026-06-01 09:54 UTCGHSA enrichment
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- 2026-05-20 14:30 UTCEG score recompute
- 2026-05-20 14:30 UTCGHSA enrichment
- 2026-05-20 11:22 UTCEPSS rescore
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Related CVEs(same CWE)
Same CWE
10 shownCWE-862
Frequently asked(5)
What is CVE-2026-3601?
When was CVE-2026-3601 disclosed?
Is CVE-2026-3601 actively exploited?
What is the CVSS score of CVE-2026-3601?
How do I remediate CVE-2026-3601?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-3601
Is Your Infrastructure Affected by CVE-2026-3601?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.