CVE-2026-96270 json
Ultimate Member <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'form_id' Parameter
published 2026-10-03 37 d ago modified 2026-10-06 34 d ago also EUVD-2026-91876
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form_id' parameter in all versions up to, and including, 2.13.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is stored in the registering user's 'submitted' usermeta via update_user_meta() and is only triggered when an administrator opens the affected user record in the wp-admin Users modal, which inserts the unescaped output via jQuery .html().
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 37 d ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/5673f2b9-1c30-4ce0-8a8c-7580d0346cb9?source=cve
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/um-short-functions.php#L980
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/um-short-functions.php#L900
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/admin/core/class-admin-builder.php#L1090
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/core/class-form.php#L768
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/core/class-form.php#L422
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.13.1/includes/core/class-user.php#L1447
- github.com /ultimatemember/ultimatemember/releases/tag/2.14.0
Sources
- CVE List CVE-2026-96270
- NVD CVE-2026-96270
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.