CVE-2025-30762 Overview
CVE-2025-30762 is a Missing Authentication for Critical Function (CWE-306) vulnerability affecting Oracle WebLogic Server, a component of Oracle Fusion Middleware. This vulnerability allows unauthenticated attackers with network access via T3 or IIOP protocols to compromise Oracle WebLogic Server instances, potentially resulting in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data.
Critical Impact
Unauthenticated remote attackers can exploit this vulnerability to gain unauthorized access to sensitive data stored within Oracle WebLogic Server environments without requiring any user interaction or authentication credentials.
Affected Products
- Oracle WebLogic Server 12.2.1.4.0
- Oracle WebLogic Server 14.1.1.0.0
- Oracle WebLogic Server 14.1.2.0.0
Discovery Timeline
- 2025-07-15 - CVE-2025-30762 published to NVD
- 2025-07-24 - Last updated in NVD database
Technical Details for CVE-2025-30762
Vulnerability Analysis
This vulnerability exists within the Core component of Oracle WebLogic Server and stems from missing authentication controls for critical functions. The flaw allows attackers to bypass authentication mechanisms when accessing WebLogic Server through T3 (WebLogic's proprietary protocol) or IIOP (Internet Inter-ORB Protocol) network connections.
The attack is easily exploitable, requiring no privileges or user interaction. Once exploited, an attacker gains unauthorized read access to sensitive data managed by the WebLogic Server, including configuration files, application data, and potentially credentials stored within the server environment. The vulnerability specifically impacts confidentiality, with no direct impact on integrity or availability.
Root Cause
The root cause of CVE-2025-30762 is classified under CWE-306 (Missing Authentication for Critical Function). The WebLogic Server Core component fails to properly enforce authentication requirements for certain operations accessible via T3 and IIOP protocols. This allows remote attackers to interact with protected server functions without providing valid credentials, circumventing the intended access control mechanisms.
Attack Vector
The vulnerability is exploitable over the network through T3 or IIOP protocols, which are commonly used for WebLogic Server communication. An attacker with network access to the WebLogic Server listening ports (typically port 7001 for T3) can craft malicious requests that bypass authentication and access sensitive server data.
The attack does not require any prior authentication, privileges, or user interaction, making it highly accessible to remote attackers. Organizations exposing WebLogic Server T3 or IIOP endpoints to untrusted networks are at increased risk of exploitation.
Detection Methods for CVE-2025-30762
Indicators of Compromise
- Unusual T3 or IIOP connection attempts from unexpected source IP addresses
- Unauthorized data access events in WebLogic Server audit logs without corresponding authentication records
- Anomalous network traffic patterns targeting WebLogic Server ports (commonly 7001, 7002)
- Evidence of data exfiltration or unauthorized queries to server resources
Detection Strategies
- Monitor WebLogic Server access logs for connection attempts that bypass authentication workflows
- Implement network intrusion detection rules to identify suspicious T3/IIOP protocol traffic patterns
- Review audit trails for data access events that occur without preceding successful authentication
- Deploy application-layer monitoring to detect unusual API or service invocations on WebLogic endpoints
Monitoring Recommendations
- Enable comprehensive audit logging within Oracle WebLogic Server to capture all access attempts
- Configure SIEM solutions to alert on authentication bypass patterns or unauthorized data access
- Monitor network traffic to WebLogic Server ports for connections from untrusted sources
- Establish baseline behavior for T3/IIOP communications to identify anomalous activity
How to Mitigate CVE-2025-30762
Immediate Actions Required
- Apply the Oracle Critical Patch Update (CPU) for July 2025 immediately to all affected WebLogic Server instances
- Restrict network access to T3 and IIOP protocols to trusted networks and clients only
- Disable T3 and IIOP protocols if not required for business operations
- Implement network segmentation to isolate WebLogic Server instances from untrusted networks
Patch Information
Oracle has released security patches addressing this vulnerability in the July 2025 Critical Patch Update. Administrators should reference the Oracle Security Alert for July 2025 for detailed patching instructions and affected version information. Apply patches to all WebLogic Server installations running versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0.
Workarounds
- Configure network firewalls to block T3 and IIOP traffic from untrusted networks
- Use WebLogic Server's connection filter functionality to restrict T3/IIOP connections to authorized hosts
- Implement VPN or other secure access methods for remote administration requiring T3/IIOP protocols
- Consider deploying a web application firewall (WAF) to provide additional protection for WebLogic endpoints
# Example: Configure WebLogic Server connection filter to restrict T3/IIOP access
# Add to config.xml within the <security-configuration> element:
# <connection-filter>weblogic.security.net.ConnectionFilterImpl</connection-filter>
# <connection-filter-rules>
# # Allow T3/IIOP only from trusted subnet
# 192.168.1.0/24 * * allow t3 t3s iiop iiops
# # Deny all other T3/IIOP connections
# * * * deny t3 t3s iiop iiops
# </connection-filter-rules>
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