CVE-2026-76548: CWE-287 Improper Authentication in User Profile Builder
Description
User Profile Builder WordPress plugin versions 3.8.1 and prior do not properly restrict front-end file upload functionality. This flaw allows unauthenticated users to list the site's media library and modify unpublished posts, pages, and media items of other users. The vulnerability is classified as CWE-287 (Improper Authentication) and has a high severity score of 8.2. No official patch or remediation guidance is currently available.
CVSS v3.1
Score 8.2high
Affected software
User Profile Builder
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76548 describes an improper authentication vulnerability in the User Profile Builder WordPress plugin before version 4.0.1. The plugin's front-end file upload feature lacks proper access controls, enabling unauthenticated visitors to access privileged capabilities such as enumerating the media library and modifying unpublished content belonging to other users. This elevates the risk of unauthorized content manipulation and information disclosure.
Potential Impact
An attacker without authentication can list media files and modify unpublished posts, pages, and media items of other users. This compromises content integrity and confidentiality within the affected WordPress site. The vulnerability does not impact availability. The CVSS v3.1 base score is 8.2 (High), reflecting network attack vector, low complexity, no privileges required, no user interaction, and impact on confidentiality and integrity.
Mitigation Recommendations
No official patch or remediation level has been published by the vendor as of now. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the plugin's front-end file upload feature through other means such as web application firewall rules or disabling the feature if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-19T12:04:02.085Z
- State
- PUBLISHED
Threat ID: 6a927ab6acd9273b496bdebc
Added to database: 08/29/2026, 06:22:46 UTC
Last enriched: 09/08/2026, 02:52:16 UTC
Last updated: 10/12/2026, 06:48:19 UTC
Views: 53
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