CVE-2025-61757: Oracle Identity Manager Auth Bypass Flaw

CVE-2025-61757 Overview

CVE-2025-61757 is a critical authentication bypass vulnerability affecting the REST WebServices component of Oracle Identity Manager, a key product within the Oracle Fusion Middleware suite. This vulnerability allows unauthenticated attackers with network access via HTTP to completely compromise Oracle Identity Manager instances. Due to the missing authentication for critical functions (CWE-306), successful exploitation can result in a full takeover of the Identity Manager system, impacting confidentiality, integrity, and availability of managed identities and access controls.

Critical Impact

This vulnerability is actively exploited in the wild and has been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. Unauthenticated remote attackers can achieve complete system takeover of Oracle Identity Manager, potentially compromising enterprise identity infrastructure and downstream access controls.

Affected Products

• Oracle Identity Manager 12.2.1.4.0
• Oracle Identity Manager 14.1.2.1.0
• Oracle Fusion Middleware environments utilizing affected Identity Manager versions

Discovery Timeline

• October 21, 2025 - CVE-2025-61757 published to NVD
• November 24, 2025 - Last updated in NVD database

Technical Details for CVE-2025-61757

Vulnerability Analysis

This vulnerability stems from missing authentication enforcement in the REST WebServices component of Oracle Identity Manager. The flaw allows unauthenticated attackers to access sensitive REST API endpoints that should require proper authentication and authorization. Since Oracle Identity Manager serves as a centralized identity and access management solution for enterprises, compromising this system provides attackers with extensive access to user credentials, provisioning workflows, and administrative functions across the organization's identity infrastructure.

The easily exploitable nature of this vulnerability means attackers can leverage it without requiring any privileges, user interaction, or complex attack chains. The network-based attack vector via HTTP indicates the vulnerable REST endpoints are exposed to the network and can be targeted remotely.

Root Cause

The root cause of CVE-2025-61757 is classified under CWE-306 (Missing Authentication for Critical Function). The REST WebServices component fails to properly verify that requests to critical API endpoints originate from authenticated users. This architectural flaw allows malicious actors to bypass intended security controls and directly interact with sensitive functionality that manages enterprise identities, access policies, and user provisioning.

Attack Vector

The attack vector for CVE-2025-61757 is network-based, requiring only HTTP access to the vulnerable Oracle Identity Manager instance. An attacker positioned on the same network or with external access to exposed Identity Manager services can craft malicious HTTP requests targeting the vulnerable REST WebServices endpoints. The attack requires no authentication credentials, no user interaction, and can be executed with low complexity.

Successful exploitation allows attackers to perform unauthorized actions including:

• Reading sensitive identity data and credentials
• Modifying user accounts and access permissions
• Creating backdoor administrative accounts
• Disrupting identity management services
• Pivoting to downstream systems that trust Identity Manager for authentication

Detection Methods for CVE-2025-61757

Indicators of Compromise

• Unexpected HTTP requests to Oracle Identity Manager REST API endpoints from unauthorized sources or external IP addresses
• Creation of new administrative or privileged user accounts without corresponding legitimate provisioning workflows
• Anomalous API call patterns targeting identity management functions outside normal business hours
• Authentication or authorization logs showing successful operations without preceding valid authentication events

Detection Strategies

• Implement network-level monitoring for HTTP traffic to Oracle Identity Manager REST endpoints, alerting on requests that bypass authentication gateways
• Deploy web application firewall (WAF) rules to detect and block unauthenticated access attempts to sensitive Identity Manager API paths
• Enable comprehensive audit logging on Oracle Identity Manager and correlate logs with SIEM solutions to identify unauthorized administrative actions
• Monitor for indicators of lateral movement from compromised identity infrastructure to downstream systems

Monitoring Recommendations

• Review Oracle Identity Manager audit logs daily for suspicious provisioning or deprovisioning activities
• Establish baseline API usage patterns and configure alerts for deviations that may indicate exploitation attempts
• Monitor CISA KEV alerts and threat intelligence feeds for active exploitation campaigns targeting CVE-2025-61757
• Validate integrity of Identity Manager configurations and administrative accounts regularly

How to Mitigate CVE-2025-61757

Immediate Actions Required

• Apply the security patches provided in the Oracle Security Alert October 2025 immediately
• If patching is not immediately possible, restrict network access to Oracle Identity Manager REST WebServices to trusted internal networks only
• Audit all administrative accounts and access permissions within Oracle Identity Manager for unauthorized changes
• Enable enhanced logging and monitoring on Identity Manager instances to detect exploitation attempts

Patch Information

Oracle has released security patches addressing CVE-2025-61757 as part of the October 2025 Critical Patch Update (CPU). Affected organizations should immediately apply the relevant patches for Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0. The official security advisory is available at the Oracle Security Alerts page. Given active exploitation confirmed by CISA, patching should be treated as an emergency priority.

Workarounds

• Implement network segmentation to restrict access to Oracle Identity Manager REST WebServices, allowing connections only from trusted management networks
• Deploy a reverse proxy or web application firewall in front of Identity Manager to enforce authentication before requests reach the vulnerable component
• Disable or restrict access to non-essential REST API endpoints until patches can be applied
• Monitor the SANS Internet Storm Center for updated threat intelligence and exploitation indicators

# Example: Restrict Identity Manager REST API access via iptables
# Allow only trusted management subnet to access REST endpoints
iptables -A INPUT -p tcp --dport 14000 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 14000 -j DROP