Overview
CVE-2025-12140 is a critical security vulnerability affecting an application that utilizes an insecure redirect mechanism. Specifically, the application improperly processes the value of the redirectUrlParameter parameter. This flaw allows an unauthenticated attacker to inject and execute arbitrary code by crafting a malicious request containing a Java expression. Exploitation of this vulnerability leads to complete system compromise. This issue has been addressed in version wu#2016.1.5513#0#20251014_113353.
Technical Details
The vulnerability stems from the application’s failure to properly sanitize or validate the input provided through the redirectUrlParameter. Instead of treating the value as a simple URL to redirect to, the application interprets it as a Java expression. This allows an attacker to inject malicious code that will be executed by the server when the redirect is processed. The lack of authentication required to trigger this flaw significantly elevates the risk. The attack vector involves crafting a URL that includes the malicious Java expression within the redirectUrlParameter value.
Example (Illustrative – Do not attempt on live systems):
http://example.com/redirect?redirectUrlParameter=${Runtime.getRuntime().exec("malicious_command")}
Important Note: The above example is simplified for demonstration purposes only. The actual payload required to exploit this vulnerability may be more complex and dependent on the specific application context and Java version. Do not attempt to execute this on any production system.
CVSS Analysis
Due to the nature of this report being based on the CVE details provided, the CVSS score is currently listed as N/A. However, given the unauthenticated remote code execution, the CVSS score is highly likely to be in the critical range (9.0-10.0) upon analysis by vulnerability scoring systems like NVD or similar. We will update this section with the official CVSS score as soon as it is available.
Possible Impact
The impact of CVE-2025-12140 is severe. Successful exploitation allows an unauthenticated attacker to execute arbitrary code on the affected system. This can lead to:
- Full system compromise
- Data breach and exfiltration
- Denial of service (DoS)
- Malware installation
- Privilege escalation
Mitigation and Patch Steps
The primary mitigation is to upgrade to version wu#2016.1.5513#0#20251014_113353 or later, where the vulnerability is patched. If upgrading is not immediately possible, consider the following temporary workarounds:
- Disable the redirect functionality: If possible, temporarily disable the feature that utilizes the
redirectUrlParameteruntil the patch can be applied. - Input validation and sanitization: Implement strict input validation and sanitization on the
redirectUrlParameter. Ensure that the value is a valid URL and does not contain any potentially harmful characters or expressions. Whitelisting is preferable to blacklisting. - Web Application Firewall (WAF) rules: Implement WAF rules to detect and block requests containing suspicious patterns or code within the
redirectUrlParameter.
Note: These workarounds are temporary and should not be considered a replacement for applying the official patch.
