CVE-2025-67624: Optimize More! Images Auth Bypass Flaw

CVE-2025-67624 Overview

A Missing Authorization vulnerability has been identified in the Arya Dhiratara Optimize More! – Images WordPress plugin (optimize-more-images). This broken access control vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized actions within affected WordPress installations.

The vulnerability stems from CWE-862 (Missing Authorization), where the plugin fails to properly verify user permissions before processing sensitive requests. This allows unauthenticated or low-privileged users to perform actions that should be restricted to administrators or authorized users only.

Critical Impact

Unauthenticated attackers can exploit broken access controls to manipulate image optimization settings and potentially affect site integrity and availability.

Affected Products

• Optimize More! – Images WordPress Plugin versions up to and including 1.1.3
• WordPress installations running the affected plugin versions
• Sites using the optimize-more-images plugin without proper access control hardening

Discovery Timeline

• 2026-02-20 - CVE CVE-2025-67624 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-67624

Vulnerability Analysis

This vulnerability represents a classic broken access control issue in the WordPress plugin ecosystem. The Optimize More! – Images plugin fails to implement proper authorization checks on sensitive functionality, allowing unauthorized users to interact with plugin features that should be restricted.

Missing authorization vulnerabilities occur when an application does not verify that a user has the necessary permissions before allowing access to a resource or function. In WordPress plugins, this typically manifests when AJAX handlers or REST API endpoints lack proper capability checks using functions like current_user_can().

The network-based attack vector means exploitation can occur remotely without requiring local system access. The vulnerability can impact both the integrity and availability of affected systems, allowing attackers to potentially modify plugin settings or cause service disruptions.

Root Cause

The root cause is the absence of proper authorization checks (CWE-862) within the plugin's code. WordPress provides built-in functions for capability checking, but when developers fail to implement these checks on sensitive endpoints or administrative functions, unauthorized users can invoke these functions directly.

In WordPress plugins, common locations for missing authorization include:

• AJAX action handlers without check_ajax_referer() or capability checks
• REST API endpoints without proper permission callbacks
• Direct file access without authentication verification
• Administrative page callbacks without current_user_can() validation

Attack Vector

The vulnerability is exploitable over the network with low attack complexity and requires no user interaction or special privileges. An attacker can identify unprotected endpoints in the plugin and send crafted HTTP requests to trigger functionality that should be restricted to authenticated administrators.

Exploitation typically involves:

1. Identifying exposed AJAX actions or REST endpoints in the plugin
2. Crafting requests that invoke administrative or sensitive functions
3. Sending requests directly without proper authentication tokens
4. The plugin processes the request due to missing authorization checks

For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-67624

Indicators of Compromise

• Unusual HTTP requests to WordPress AJAX handlers (admin-ajax.php) with optimize-more-images related actions from unauthenticated sessions
• Unexpected changes to image optimization settings without corresponding admin activity logs
• Anomalous plugin behavior or configuration modifications without authorized user sessions
• Access log entries showing direct requests to plugin endpoints without proper authentication cookies

Detection Strategies

• Monitor WordPress access logs for suspicious requests targeting the optimize-more-images plugin endpoints
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized access attempts to plugin administrative functions
• Review WordPress activity logs for unauthorized configuration changes to the Optimize More! – Images plugin
• Deploy endpoint detection to identify unusual patterns of requests to WordPress AJAX handlers

Monitoring Recommendations

• Enable detailed WordPress access logging to capture all plugin-related HTTP requests
• Configure alerts for plugin settings modifications outside of normal administrative hours or user sessions
• Implement real-time monitoring of admin-ajax.php requests with plugin-specific action parameters
• Regularly audit user activity logs for signs of privilege abuse or unauthorized access patterns

How to Mitigate CVE-2025-67624

Immediate Actions Required

• Update the Optimize More! – Images plugin to a version newer than 1.1.3 when a patched version becomes available
• Temporarily deactivate the plugin if it is not critical to site operations until a fix is released
• Implement Web Application Firewall rules to restrict access to plugin administrative endpoints
• Review WordPress user accounts and remove any unauthorized or suspicious accounts
• Audit recent site activity logs for potential exploitation attempts

Patch Information

Organizations should monitor for an updated version of the Optimize More! – Images plugin that addresses this broken access control vulnerability. Check the WordPress plugin repository and the Patchstack vulnerability database for patch availability updates.

Until a patch is available, consider implementing the workarounds below to reduce exposure.

Workarounds

• Restrict access to admin-ajax.php for unauthenticated users via server-level configuration where feasible
• Implement additional authorization at the web server level using .htaccess or nginx configuration rules
• Use a WordPress security plugin to add capability checks and nonce verification for vulnerable endpoints
• Consider temporarily replacing the plugin with an alternative image optimization solution that has proper access controls

# Example .htaccess rule to restrict admin-ajax.php access (may affect other functionality)
# Add to WordPress root .htaccess file - test thoroughly before production use
<Files admin-ajax.php>
    <RequireAll>
        Require all granted
        # Additional logging for monitoring
    </RequireAll>
</Files>

# Alternative: Use a security plugin like Wordfence or implement 
# server-level rate limiting on admin-ajax.php requests