Karl.Fail

Tag: weblogic

  • CVE-2025-21535: Critical Unauthenticated Remote Exploit in Oracle WebLogic Server

    Overview

    Oracle has disclosed a critical vulnerability tracked as CVE-2025-21535 in its Oracle WebLogic Server product, part of Oracle Fusion Middleware. The vulnerability affects versions 12.2.1.4.0 and 14.1.1.0.0 and allows unauthenticated attackers with network access to take full control of the server via the T3 or IIOP protocol.

    Technical Details

    This vulnerability is found in the Core component of WebLogic Server. It has been classified under CWE-306: Missing Authentication for Critical Function, indicating a failure to enforce proper authentication checks on sensitive functions. The result is a flaw that is easily exploitable by a remote attacker with no prior access.

    The CVSS v3.1 base score is 9.8 (Critical) and the vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating:

    • Remote exploitability over the network
    • Low complexity
    • No privileges required
    • No user interaction needed
    • High impact on confidentiality, integrity, and availability

    Impact

    If successfully exploited, the vulnerability can result in:

    • Complete system compromise
    • Data breach and unauthorized modification
    • Denial of service or full disruption of applications relying on WebLogic

    The vulnerability enables threat actors to execute arbitrary code or commands, making it suitable for automated exploitation and malware deployment in enterprise environments.

    Affected Versions

    • Oracle WebLogic Server 12.2.1.4.0
    • Oracle WebLogic Server 14.1.1.0.0

    Organizations running these versions should consider themselves at high risk if mitigation is not applied promptly.

    Mitigation

    Oracle addressed the issue in its January 2025 Critical Patch Update (CPU). Organizations are urged to:

    • Apply the relevant security patches immediately
    • Restrict T3 and IIOP access at the network level
    • Monitor logs for signs of unauthorized access or unusual traffic

    According to CISA’s SSVC framework, the issue has total technical impact and is automatable, highlighting the urgency of applying mitigation measures.

    Conclusion

    CVE-2025-21535 presents a critical threat to organizations running Oracle WebLogic Server. Its unauthenticated, remote nature and high impact across all core security domains make it a priority vulnerability. Timely patching and strong network controls are essential to minimize risk.

  • Critical Remote Takeover Vulnerability in Oracle WebLogic Server (CVE-2025-21535)

    Overview

    CVE-2025-21535 is a critical vulnerability impacting Oracle WebLogic Server, part of Oracle Fusion Middleware. The flaw allows unauthenticated attackers with network access via T3 or IIOP protocols to fully compromise vulnerable systems without user interaction.

    Technical Details

    This vulnerability resides in the Core component of WebLogic Server and is categorized under CWE-306: Missing Authentication for Critical Function. The issue enables attackers to send specially crafted requests to execute arbitrary operations on the server, resulting in complete system takeover.

    The attack does not require credentials or any user interaction. Exploitation is possible over the network, making this vulnerability especially dangerous in exposed environments or misconfigured systems.

    CVSS Score and Severity

    The vulnerability has been assigned a CVSS v3.1 score of 9.8 (Critical). The vector string is:

    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

    • Attack Vector: Network
    • Attack Complexity: Low
    • Privileges Required: None
    • User Interaction: None
    • Scope: Unchanged
    • Impact: High on confidentiality, integrity, and availability

    Affected Versions

    • Oracle WebLogic Server 12.2.1.4.0
    • Oracle WebLogic Server 14.1.1.0.0

    Both versions are vulnerable and require immediate remediation.

    Mitigation and Recommendations

    • Apply the patches provided in Oracle’s January 2025 Critical Patch Update (CPU) without delay.
    • Restrict external access to T3 and IIOP protocols at the network perimeter.
    • Monitor logs for signs of unauthorized access or suspicious activity targeting WebLogic services.

    Conclusion

    CVE-2025-21535 represents a highly exploitable vulnerability with the potential for full remote takeover of WebLogic Server instances. Given the critical nature of this flaw and its network accessibility, organizations using the affected versions must act urgently to secure their systems.

    For more information, consult the official Oracle advisory: Oracle CPU January 2025