CVE-2025-22548: LDAP Login Manager Stored XSS Vulnerability

CVE-2025-22548 Overview

CVE-2025-22548 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the WordPress LDAP Login Password and Role Manager plugin developed by frankkoenen. The vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject and persist malicious scripts within the application. This vulnerability is chained with a Cross-Site Request Forgery (CSRF) attack vector, enabling unauthenticated attackers to potentially exploit this flaw through social engineering techniques.

Critical Impact

Attackers can leverage CSRF to inject persistent malicious scripts that execute in the context of authenticated administrator sessions, potentially leading to account takeover, privilege escalation, and compromise of WordPress site integrity.

Affected Products

• WordPress LDAP Login Password and Role Manager plugin versions up to and including 1.0.12
• WordPress installations using the ldap-login-password-and-role-manager plugin
• Web applications integrating LDAP authentication through this vulnerable plugin

Discovery Timeline

• 2025-01-07 - CVE-2025-22548 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-22548

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The LDAP Login Password and Role Manager plugin fails to properly sanitize user-supplied input before storing and subsequently rendering it within web pages. When combined with missing CSRF protections, this creates a dangerous attack chain where an attacker can trick an authenticated administrator into unknowingly submitting a malicious request that injects persistent JavaScript code into the plugin's configuration or display areas.

The stored nature of this XSS vulnerability means that the malicious payload persists in the application's database and executes every time a user views the affected page. This makes it particularly dangerous in administrative contexts where privileged users regularly interact with plugin settings.

Root Cause

The root cause of this vulnerability is twofold:

1. Insufficient Input Validation: The plugin does not adequately sanitize or escape user-controlled input before storing it in the database or rendering it in HTML output. WordPress provides functions like sanitize_text_field(), esc_html(), and wp_kses() for this purpose, but these appear to be missing or improperly implemented.

2. Missing CSRF Protection: The plugin lacks proper nonce verification on forms that accept user input, allowing attackers to craft malicious requests that can be executed when an authenticated administrator visits an attacker-controlled page.

Attack Vector

The attack follows a CSRF-to-Stored-XSS chain:

1. The attacker crafts a malicious HTML page containing a hidden form that submits data to the vulnerable plugin endpoint
2. The attacker entices an authenticated WordPress administrator to visit the malicious page
3. The form automatically submits, injecting malicious JavaScript code into the plugin's stored configuration
4. When any user (including administrators) views the affected page, the stored XSS payload executes in their browser context
5. The malicious script can then steal session cookies, perform actions as the victim, modify page content, or redirect users to phishing sites

The vulnerability manifests in the plugin's input handling mechanism where user-supplied data is stored without proper sanitization. See the Patchstack Vulnerability Report for detailed technical information.

Detection Methods for CVE-2025-22548

Indicators of Compromise

• Unexpected JavaScript code or HTML tags appearing in plugin configuration fields or database entries related to LDAP settings
• Suspicious outbound connections originating from administrator browsers when accessing the LDAP plugin settings
• Unexpected administrator account creations or privilege changes without corresponding audit trail entries
• Browser console errors or unexpected script execution when viewing plugin configuration pages

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in POST requests to WordPress admin endpoints
• Monitor WordPress database tables associated with the LDAP plugin for unexpected script tags or JavaScript event handlers
• Deploy Content Security Policy (CSP) headers to detect and prevent execution of inline scripts not explicitly allowed
• Use browser-based XSS auditing tools to scan administrative pages for reflected or stored script content

Monitoring Recommendations

• Enable detailed WordPress audit logging to track all administrative actions and configuration changes
• Configure alerts for modifications to plugin settings, especially those related to LDAP configuration
• Monitor HTTP request logs for unusual POST requests to the LDAP plugin's administrative endpoints
• Implement real-time alerting for new administrator account creation or role elevation events

How to Mitigate CVE-2025-22548

Immediate Actions Required

• Immediately deactivate and remove the LDAP Login Password and Role Manager plugin if version 1.0.12 or earlier is installed
• Review WordPress database for any stored malicious scripts injected through the vulnerable plugin
• Audit administrator accounts and sessions for signs of compromise or unauthorized access
• Consider implementing alternative LDAP authentication solutions until a patched version is available

Patch Information

At the time of publication, no official patch has been confirmed for this vulnerability. The affected versions include all releases from the initial version through 1.0.12. Organizations should monitor the plugin developer's official repository and the WordPress plugin directory for security updates. For the latest information, consult the Patchstack Vulnerability Report.

Workarounds

• Restrict access to WordPress administrative interfaces to trusted IP addresses only using firewall rules or .htaccess configurations
• Implement a Web Application Firewall with rules specifically targeting XSS and CSRF attack patterns
• Enable multi-factor authentication for all WordPress administrator accounts to reduce impact of session hijacking
• Deploy Content Security Policy headers to prevent execution of unauthorized inline scripts

# Example .htaccess configuration to restrict admin access
<Files wp-login.php>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>

<Directory "/var/www/html/wp-admin">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>