CVE-2025-24530: phpMyAdmin XSS Vulnerability

CVE-2025-24530 Overview

An issue was discovered in phpMyAdmin 5.x before 5.2.2. A Cross-Site Scripting (XSS) vulnerability has been discovered in the check tables feature. A crafted table or database name could be used to inject malicious scripts, potentially allowing attackers to execute arbitrary JavaScript code in the context of an authenticated user's browser session.

Critical Impact

Attackers with database access can inject malicious scripts through specially crafted table or database names, potentially leading to session hijacking, credential theft, or unauthorized administrative actions within phpMyAdmin.

Affected Products

• phpMyAdmin 5.x versions before 5.2.2
• Systems running vulnerable phpMyAdmin installations with the check tables feature enabled

Discovery Timeline

• 2025-01-23 - CVE CVE-2025-24530 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-24530

Vulnerability Analysis

This XSS vulnerability (CWE-79) exists within phpMyAdmin's check tables functionality. The application fails to properly sanitize user-controllable input when processing table and database names during the table checking operation. When a user with database creation privileges creates a table or database with a specially crafted name containing JavaScript code, that code is executed in the browser of any user who subsequently uses the check tables feature on that object.

The attack requires the attacker to have at least low-level privileges (sufficient to create tables or databases) within the phpMyAdmin environment. Once the malicious name is in place, the XSS payload executes within the security context of the victim's session, potentially allowing the attacker to steal session cookies, perform actions as the victim, or redirect them to malicious sites.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in phpMyAdmin's check tables feature. When rendering table and database names in the user interface, the application fails to properly escape special HTML characters, allowing embedded script content to be interpreted as executable code by the browser rather than being displayed as plain text.

Attack Vector

The attack is network-based and requires the attacker to have authenticated access to phpMyAdmin with sufficient privileges to create database objects. The exploitation flow involves:

1. An attacker with low-level database privileges creates a table or database with a name containing malicious JavaScript payload
2. A victim user (potentially with higher privileges such as an administrator) accesses the check tables feature
3. The malicious table/database name is rendered without proper sanitization
4. The embedded JavaScript executes in the victim's browser context
5. The attacker can then steal session tokens, perform CSRF attacks, or execute unauthorized administrative actions

The vulnerability does not require user interaction beyond normal phpMyAdmin usage, making it particularly dangerous in shared hosting or multi-user database environments.

Detection Methods for CVE-2025-24530

Indicators of Compromise

• Unusual table or database names containing HTML special characters such as <, >, script, or JavaScript event handlers
• Database objects with names containing encoded JavaScript payloads (URL encoding, HTML entities)
• Unexpected session token exfiltration attempts in network logs
• Unusual administrative actions performed without corresponding user activity

Detection Strategies

• Monitor database audit logs for creation of tables or databases with suspicious naming patterns
• Implement Content Security Policy (CSP) headers to detect and block inline script execution
• Review web server access logs for unusual patterns in phpMyAdmin check tables requests
• Deploy web application firewalls (WAF) with XSS detection rules targeting the phpMyAdmin application path

Monitoring Recommendations

• Enable detailed logging for database object creation and modification events
• Configure browser security monitoring for CSP violation reports
• Implement real-time alerting for database objects created with names matching XSS patterns
• Monitor for unusual JavaScript errors in client-side application monitoring tools

How to Mitigate CVE-2025-24530

Immediate Actions Required

• Upgrade phpMyAdmin to version 5.2.2 or later immediately
• Audit existing database and table names for suspicious content containing script tags or JavaScript
• Implement Content Security Policy headers to mitigate potential exploitation
• Restrict phpMyAdmin access to trusted networks and users only
• Consider temporarily disabling the check tables feature until patching is complete

Patch Information

The phpMyAdmin development team has addressed this vulnerability in version 5.2.2. Organizations should upgrade to this version or later as soon as possible. For detailed information about the security fix, refer to the phpMyAdmin Security Advisory. Debian users should also consult the Debian LTS Announcement for distribution-specific update instructions.

Workarounds

• Implement strict database naming policies that reject special characters at the application or database level
• Deploy a Web Application Firewall (WAF) with rules to detect and block XSS patterns in phpMyAdmin requests
• Restrict access to phpMyAdmin to trusted administrators only using IP whitelisting or VPN requirements
• Enable Content Security Policy headers to prevent inline script execution as a defense-in-depth measure

# Example Apache configuration to add CSP headers for phpMyAdmin
<Directory /usr/share/phpmyadmin>
    Header always set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"
    Header always set X-XSS-Protection "1; mode=block"
    Header always set X-Content-Type-Options "nosniff"
</Directory>