CVE-2026-8489 json
Ultimate Member <= 2.11.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Non-HTML Custom Textarea Profile Field
published 2026-07-03 4 mo ago modified 2026-07-06 4 mo ago also EUVD-2026-41486
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- 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 'about_me' parameter in all versions up to, and including, 2.11.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/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/229a4e61-571c-44c6-9972-4dfc743afffe?source=cve
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.4/includes/core/um-filters-fields.php#L271
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.4/includes/core/class-profile.php#L479
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.4/includes/core/class-fields.php#L4577
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.4/includes/core/class-form.php#L854
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.4/includes/core/um-actions-form.php#L628
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.2/includes/core/um-filters-fields.php#L271
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.2/includes/core/class-profile.php#L479
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.2/includes/core/class-fields.php#L4577
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.2/includes/core/class-form.php#L854
- plugins.trac.wordpress.org /browser/ultimate-member/tags/2.11.2/includes/core/um-actions-form.php#L628
Sources
- CVE List CVE-2026-8489
- NVD CVE-2026-8489
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.