CVE-2026-22486: Re Gallery Plugin Auth Bypass Flaw

CVE-2026-22486 Overview

A Missing Authorization vulnerability has been identified in the Hakob Re Gallery & Responsive Photo Gallery Plugin for WordPress. This broken access control vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized modification of gallery content and settings without proper authentication. The vulnerability stems from CWE-862 (Missing Authorization), where the plugin fails to properly validate user permissions before allowing access to protected functionality.

Critical Impact

Unauthenticated attackers can exploit broken access control to bypass security restrictions and perform unauthorized actions on WordPress gallery installations, potentially leading to data manipulation and integrity compromise.

Affected Products

• Re Gallery & Responsive Photo Gallery Plugin versions up to and including 1.17.18
• WordPress installations running vulnerable versions of the Re Gallery plugin

Discovery Timeline

• 2026-01-08 - CVE-2026-22486 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-22486

Vulnerability Analysis

This vulnerability represents a classic broken access control flaw where the Re Gallery & Responsive Photo Gallery Plugin fails to implement proper authorization checks on sensitive functionality. The missing authorization allows network-based attackers to bypass intended access restrictions without requiring any authentication or user interaction. The vulnerability specifically affects the plugin's access control mechanisms, enabling exploitation of incorrectly configured security levels.

The attack can be executed remotely over the network with low complexity, requiring no privileges or user interaction. While the vulnerability does not impact confidentiality or availability, it poses a significant risk to data integrity, allowing unauthorized modification of gallery content and settings.

Root Cause

The root cause of CVE-2026-22486 is the absence of proper authorization checks (CWE-862) within the Re Gallery plugin's codebase. The plugin fails to verify whether the requesting user has appropriate permissions before processing sensitive operations. This architectural flaw allows unauthenticated users to access functionality that should be restricted to authenticated administrators or editors only.

Attack Vector

The vulnerability is exploitable via network-based requests to the WordPress installation running the vulnerable plugin. An attacker does not need to be authenticated to exploit this vulnerability. The attack flow involves:

1. Identifying a WordPress site running Re Gallery & Responsive Photo Gallery Plugin version 1.17.18 or earlier
2. Sending crafted requests to plugin endpoints that lack proper authorization checks
3. Bypassing access control to perform unauthorized actions on gallery content

The vulnerability manifests in the plugin's request handling where authorization validation is missing. For detailed technical information, refer to the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2026-22486

Indicators of Compromise

• Unexpected modifications to gallery content or settings without corresponding admin activity
• Unusual HTTP requests to Re Gallery plugin endpoints from unauthenticated sources
• Web server logs showing direct access to plugin AJAX handlers without proper WordPress nonce validation
• Gallery entries or configurations modified by non-admin users or unknown sources

Detection Strategies

• Monitor WordPress access logs for suspicious requests targeting /wp-admin/admin-ajax.php with Re Gallery-related actions
• Implement Web Application Firewall (WAF) rules to detect unauthorized access attempts to gallery plugin endpoints
• Review WordPress audit logs for gallery modifications not correlated with authenticated admin sessions
• Deploy SentinelOne Singularity to detect and alert on anomalous file system or database modifications associated with the plugin

Monitoring Recommendations

• Enable detailed WordPress activity logging to track all gallery-related operations
• Configure alerts for any gallery modifications occurring outside normal administrative windows
• Monitor for mass or automated requests to plugin endpoints that may indicate exploitation attempts
• Implement integrity monitoring on gallery-related database tables and file directories

How to Mitigate CVE-2026-22486

Immediate Actions Required

• Update Re Gallery & Responsive Photo Gallery Plugin to the latest patched version immediately
• Audit gallery content and settings for any unauthorized modifications
• Review WordPress access logs for evidence of exploitation attempts
• Consider temporarily disabling the plugin if an update is not immediately available
• Implement additional access control at the web server level if required

Patch Information

Users should update the Re Gallery & Responsive Photo Gallery Plugin to a version newer than 1.17.18. The vulnerability affects all versions from the initial release through version 1.17.18. Check the official WordPress plugin repository or the Patchstack Vulnerability Advisory for the latest security update information.

Workarounds

• Implement Web Application Firewall (WAF) rules to block unauthorized requests to vulnerable plugin endpoints
• Restrict access to WordPress admin AJAX handlers at the web server level for unauthenticated users
• Use WordPress security plugins to add additional authorization layers to plugin functionality
• Consider implementing IP-based access restrictions for WordPress administrative functions

# Apache .htaccess workaround to restrict AJAX access
# Add to WordPress root .htaccess file
<Files admin-ajax.php>
    <RequireAny>
        Require ip 192.168.1.0/24
        Require valid-user
    </RequireAny>
</Files>