CVE-2025-11250: ManageEngine ADSelfService Auth Bypass

CVE-2025-11250 Overview

CVE-2025-11250 is a critical authentication bypass vulnerability affecting Zohocorp ManageEngine ADSelfService Plus versions prior to 6519. The vulnerability stems from improper filter configurations within the application, allowing attackers to bypass authentication mechanisms and gain unauthorized access to protected resources. ManageEngine ADSelfService Plus is a widely deployed self-service password management and single sign-on solution integrated with Active Directory, making this vulnerability particularly concerning for enterprise environments.

Critical Impact

Unauthenticated attackers can bypass authentication controls to access sensitive password management and identity functions, potentially compromising Active Directory credentials and user accounts across the organization.

Affected Products

• Zohocorp ManageEngine ADSelfService Plus versions 6.5 builds 6500 through 6518
• Zohocorp ManageEngine ADSelfService Plus all versions prior to build 6519
• Enterprise deployments using ADSelfService Plus for Active Directory self-service password management

Discovery Timeline

• 2026-01-13 - CVE-2025-11250 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2025-11250

Vulnerability Analysis

This authentication bypass vulnerability (CWE-290: Authentication Bypass by Spoofing) allows remote attackers to circumvent security controls without requiring any prior authentication or user interaction. The flaw exists in the filter configuration layer of ADSelfService Plus, where improper validation allows requests to bypass authentication checks that should protect sensitive endpoints.

The vulnerability is network-exploitable and requires no privileges or user interaction, making it highly accessible to attackers. Successful exploitation enables unauthorized access to sensitive identity management functions with potential for both confidentiality and integrity impacts to user credentials and Active Directory data.

Root Cause

The root cause lies in improper filter configurations within ManageEngine ADSelfService Plus. Security filters designed to enforce authentication requirements on protected endpoints are misconfigured, creating pathways for unauthenticated requests to reach protected functionality. This configuration flaw effectively nullifies the authentication layer for certain request patterns or endpoints.

Attack Vector

The attack vector is network-based, requiring no authentication and no user interaction. An attacker with network access to a vulnerable ADSelfService Plus instance can craft requests that exploit the misconfigured filters to bypass authentication. Given that ADSelfService Plus is typically exposed on corporate networks and sometimes externally for remote password resets, the attack surface can be significant.

The exploitation chain involves:

1. Identifying a vulnerable ADSelfService Plus deployment
2. Crafting HTTP requests that exploit the filter misconfiguration
3. Bypassing authentication to access protected password management and identity functions
4. Potentially extracting or modifying sensitive user and credential data

Detection Methods for CVE-2025-11250

Indicators of Compromise

• Unusual access patterns to ADSelfService Plus administrative endpoints without corresponding authentication events
• HTTP requests to protected endpoints that lack valid session tokens or authentication headers
• Anomalous password reset or account modification activities without legitimate user initiation
• Access logs showing successful requests to restricted resources from unexpected source IPs

Detection Strategies

• Monitor ADSelfService Plus access logs for requests to protected endpoints that bypass normal authentication flows
• Implement web application firewall (WAF) rules to detect and block suspicious request patterns targeting authentication endpoints
• Configure SIEM alerts for authentication anomalies including access to privileged functions without preceding login events
• Deploy network monitoring to identify unusual traffic patterns to ADSelfService Plus servers

Monitoring Recommendations

• Enable verbose logging in ADSelfService Plus and forward logs to centralized security monitoring
• Establish baseline access patterns for ADSelfService Plus and alert on deviations
• Monitor Active Directory event logs for password changes or account modifications that don't correlate with legitimate self-service requests
• Implement real-time alerting for any administrative actions within ADSelfService Plus

How to Mitigate CVE-2025-11250

Immediate Actions Required

• Upgrade ManageEngine ADSelfService Plus to build 6519 or later immediately
• Restrict network access to ADSelfService Plus to trusted networks and users pending patch application
• Review access logs for evidence of exploitation attempts
• Implement additional network segmentation around ADSelfService Plus deployments

Patch Information

Zohocorp has released a security update addressing this vulnerability in ADSelfService Plus build 6519. Organizations should apply this update immediately to remediate the authentication bypass flaw. Detailed patch information and upgrade instructions are available in the ManageEngine Security Advisory.

Workarounds

• Place ADSelfService Plus behind a reverse proxy or WAF with strict authentication enforcement
• Restrict network access using firewall rules to limit exposure to trusted internal networks only
• Temporarily disable external access to ADSelfService Plus if remote password reset functionality is not critical
• Implement IP allowlisting to restrict access to known administrative and user network ranges
• Enable multi-factor authentication at the network layer to add defense-in-depth protection

# Example: Restrict network access to ADSelfService Plus using iptables
# Allow only internal network access to ADSelfService Plus port (default 9251)
iptables -A INPUT -p tcp --dport 9251 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 9251 -s 172.16.0.0/12 -j ACCEPT
iptables -A INPUT -p tcp --dport 9251 -s 192.168.0.0/16 -j ACCEPT
iptables -A INPUT -p tcp --dport 9251 -j DROP