CVE-2025-30797: Greek Multi Tool Auth Bypass Vulnerability

CVE-2025-30797 Overview

CVE-2025-30797 is a Missing Authorization vulnerability affecting the Greek Multi Tool WordPress plugin developed by bigdrop.gr. This plugin, designed to fix permalinks, accents, auto-create menus, and provide other Greek language-specific functionality, contains a Broken Access Control flaw that allows attackers to exploit incorrectly configured access control security levels. The vulnerability enables unauthenticated attackers to access protected functionality without proper authorization checks.

Critical Impact

Unauthenticated attackers can exploit missing authorization controls to cause denial of service conditions, potentially disrupting WordPress site availability for legitimate users.

Affected Products

• Greek Multi Tool – Fix peralinks, accents, auto create menus and more plugin versions up to and including 2.3.1
• WordPress installations using vulnerable versions of the greek-multi-tool plugin

Discovery Timeline

• 2025-04-01 - CVE-2025-30797 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-30797

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), which occurs when a software application does not perform authorization checks to verify that a user is permitted to access a resource or perform an action. In the context of the Greek Multi Tool plugin, critical functionality is exposed without verifying whether the requesting user has appropriate privileges.

The attack can be executed remotely over the network without requiring authentication or user interaction. The primary impact is on availability, where successful exploitation can result in complete denial of service to the affected WordPress installation.

Root Cause

The root cause of CVE-2025-30797 lies in the absence of proper capability checks within the plugin's request handling logic. WordPress plugins should implement current_user_can() checks or similar authorization mechanisms before executing privileged operations. The Greek Multi Tool plugin fails to enforce these security controls, allowing any user—including unauthenticated visitors—to trigger functionality that should be restricted to administrators.

Attack Vector

The vulnerability is exploitable via network-based attacks with low complexity. An attacker does not require any authentication credentials or prior access to the WordPress installation. No user interaction is needed, making this vulnerability particularly dangerous as it can be exploited in automated attacks. The attack surface includes any publicly accessible WordPress site running the vulnerable plugin version.

Successful exploitation allows attackers to abuse plugin functionality intended only for authorized administrators, potentially exhausting server resources or disrupting normal site operations through repeated unauthorized requests.

Detection Methods for CVE-2025-30797

Indicators of Compromise

• Unexpected or elevated request volumes to Greek Multi Tool plugin endpoints from unauthenticated sessions
• Server resource exhaustion (CPU, memory) coinciding with plugin-related activity
• WordPress error logs showing repeated access to plugin functions without associated authenticated users
• Anomalous patterns in web server access logs targeting /wp-content/plugins/greek-multi-tool/ paths

Detection Strategies

• Monitor WordPress access logs for requests to Greek Multi Tool plugin endpoints from unauthenticated sources
• Implement web application firewall (WAF) rules to detect and block suspicious patterns targeting the plugin
• Review server performance metrics for unexpected resource consumption that may indicate exploitation attempts
• Audit WordPress plugin activity logs for unauthorized function calls

Monitoring Recommendations

• Enable detailed WordPress debug logging to capture plugin-related errors and unauthorized access attempts
• Configure real-time alerting for unusual traffic patterns to plugin endpoints
• Implement rate limiting on WordPress AJAX endpoints commonly used by plugins
• Deploy SentinelOne Singularity XDR for comprehensive endpoint monitoring and threat detection

How to Mitigate CVE-2025-30797

Immediate Actions Required

• Update the Greek Multi Tool plugin to a patched version (if available) or deactivate and remove the plugin immediately
• Review WordPress access logs for evidence of exploitation attempts
• Implement IP-based access restrictions for WordPress admin functionality as an interim measure
• Enable a Web Application Firewall (WAF) to filter malicious requests targeting the vulnerable plugin

Patch Information

At the time of publication, site administrators should check the Patchstack Vulnerability Advisory for the latest remediation guidance. If no patched version is available, complete removal of the plugin is recommended until a security update is released.

Workarounds

• Deactivate the Greek Multi Tool plugin until a security patch is released by the vendor
• Restrict access to WordPress administrative functions using .htaccess or server-level access controls
• Implement a Web Application Firewall with rules blocking unauthenticated requests to plugin endpoints
• Consider alternative plugins that provide similar Greek language functionality with better security practices

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate greek-multi-tool

# Verify plugin status
wp plugin list --status=active | grep greek-multi-tool