CVE-2026-8489: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
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.
AI Analysis
Technical Summary
The Ultimate Member plugin for WordPress suffers from a stored XSS vulnerability (CWE-79) via the 'about_me' parameter in versions up to 2.11.4. Authenticated attackers with subscriber-level privileges can inject arbitrary web scripts that execute in the context of other users viewing the injected content. This occurs because the plugin does not properly sanitize or escape input before rendering it on web pages. The vulnerability can lead to partial confidentiality and integrity impacts but does not affect availability. No official patch or remediation level has been published as of now.
Potential Impact
An attacker with subscriber-level access can inject malicious scripts that execute in other users' browsers when they view the compromised page. This can lead to theft of sensitive information accessible via the browser, session hijacking, or other client-side impacts. The vulnerability does not impact system availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict subscriber-level user privileges where possible and monitor for suspicious activity related to the 'about_me' field. Avoid granting unnecessary permissions to users who do not require them. Follow updates from the Ultimate Member plugin vendor for official patches.
CVE-2026-8489: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Description
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.
CVSS v3.1
Score 6.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Ultimate Member plugin for WordPress suffers from a stored XSS vulnerability (CWE-79) via the 'about_me' parameter in versions up to 2.11.4. Authenticated attackers with subscriber-level privileges can inject arbitrary web scripts that execute in the context of other users viewing the injected content. This occurs because the plugin does not properly sanitize or escape input before rendering it on web pages. The vulnerability can lead to partial confidentiality and integrity impacts but does not affect availability. No official patch or remediation level has been published as of now.
Potential Impact
An attacker with subscriber-level access can inject malicious scripts that execute in other users' browsers when they view the compromised page. This can lead to theft of sensitive information accessible via the browser, session hijacking, or other client-side impacts. The vulnerability does not impact system availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict subscriber-level user privileges where possible and monitor for suspicious activity related to the 'about_me' field. Avoid granting unnecessary permissions to users who do not require them. Follow updates from the Ultimate Member plugin vendor for official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-05-13T14:58:02.236Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a474a7527e9c797190a8353
Added to database: 07/03/2026, 05:36:53 UTC
Last enriched: 07/10/2026, 08:46:55 UTC
Last updated: 08/16/2026, 12:41:11 UTC
Views: 81
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