CVE-2026-12097: WordPress Auth Bypass Vulnerability

CVE-2026-12097 Overview

CVE-2026-12097 is an authorization bypass vulnerability in the User Management plugin for WordPress affecting all versions up to and including 1.2. The plugin fails to verify whether a user is authorized to perform sensitive actions. Unauthenticated attackers can modify the plugin's export field configuration stored in the uiewp_export_field option. This lets attackers control which user fields, including password hashes, are included in CSV exports and how columns map during imports. The weakness is tracked under CWE-862: Missing Authorization and is exploitable remotely without user interaction.

Critical Impact
Unauthenticated attackers can reconfigure user data export settings, potentially exposing password hashes and other sensitive user fields in subsequent CSV exports performed by administrators.

Affected Products

WordPress User Management plugin versions 1.0 through 1.2
WordPress sites with the user-management plugin installed and activated
Any administrator workflow relying on the plugin's CSV import/export functionality

Discovery Timeline

2026-07-08 - CVE-2026-12097 published to NVD
2026-07-08 - Last updated in NVD database

Technical Details for CVE-2026-12097

Vulnerability Analysis

The User Management plugin exposes functionality that updates the uiewp_export_field WordPress option without performing authorization checks. This option controls which user profile fields are included in CSV exports and defines the column mapping used during user imports. Because the handler does not verify the requester's capabilities or nonce state, any unauthenticated visitor can send a request to alter it.

An attacker can add sensitive fields such as user_pass (password hashes), user_email, or session tokens to the export configuration. When a legitimate administrator later runs a user export, the generated CSV will include the attacker-selected fields. The same misconfiguration can distort imports, mapping attacker-controlled CSV columns onto arbitrary user attributes and enabling data tampering across accounts.

Root Cause

The root cause is missing authorization enforcement in the plugin's model and import/export handlers. The relevant logic in includes/model.php and users-imp-exp-wpexperts.php writes directly to the uiewp_export_field option without calling current_user_can() or validating a nonce via check_admin_referer(). This aligns with CWE-862, where a security-relevant action lacks an authorization check.

Attack Vector

Exploitation requires only network access to the target WordPress site. The attacker issues an HTTP request to the vulnerable endpoint with parameters defining the desired export field set. No credentials, session, or user interaction are required. The impact is realized when an administrator subsequently performs an export or import, at which point sensitive fields are disclosed or imported data is mismapped.

See the Wordfence Vulnerability Report and the WordPress Implementation Code for the vulnerable handler.

Detection Methods for CVE-2026-12097

Indicators of Compromise

Unexpected modifications to the uiewp_export_field value in the WordPress wp_options table, particularly the inclusion of user_pass, user_activation_key, or session_tokens.
HTTP POST requests to plugin endpoints under /wp-content/plugins/user-management/ originating from unauthenticated sessions.
CSV exports containing password hash columns not previously configured by an administrator.

Detection Strategies

Monitor WordPress audit logs for changes to the uiewp_export_field option, correlating changes with the authenticated user context (or lack thereof).
Alert on any HTTP request touching plugin import/export handlers where the session cookie does not correspond to an administrator account.
Review recent CSV export artifacts on the filesystem or in backup storage for the presence of password hash fields.

Monitoring Recommendations

Enable WordPress activity logging plugins to capture option modifications and administrator export actions.
Forward web server access logs to a centralized analytics platform and search for requests targeting the plugin's PHP files from anonymous sources.
Track outbound transfers of CSV files from /wp-admin/ download paths and flag unusually large exports.

How to Mitigate CVE-2026-12097

Immediate Actions Required

Deactivate the User Management plugin on all WordPress sites running version 1.2 or earlier until a patched release is available.
Rotate WordPress user passwords if any unauthorized export activity is suspected, as password hashes may have been captured.
Restrict administrative access to the WordPress dashboard using IP allowlists or a web application firewall rule set.

Patch Information

At the time of publication, no vendor-supplied patch beyond version 1.2 is referenced in the Wordfence Vulnerability Report. Administrators should monitor the User Management plugin repository for an updated version that adds capability checks and nonce verification to the affected handlers.

Workarounds

Remove the plugin directory wp-content/plugins/user-management/ from the webroot if the plugin is not actively required.
Deploy a web application firewall rule that blocks unauthenticated POST requests to the plugin's import/export endpoints.
Manually reset the uiewp_export_field option to a known-good value and audit all recent CSV export outputs for sensitive columns.

bash

# Reset the export field configuration via WP-CLI
wp option delete uiewp_export_field

# Or disable the plugin entirely
wp plugin deactivate user-management
wp plugin delete user-management