Overview of CVE-2025-27625
CVE-2025-27625 addresses a vulnerability found in Jenkins, versions 2.499 and earlier and LTS 2.492.1 and earlier. This vulnerability manifests in the way redirect URLs are handled, specifically those beginning with the backslash () character. Such redirects are misinterpreted by browsers, potentially allowing attackers to redirect users to malicious sites through crafted URLs linked to Jenkins, thereby paving the way for phishing attacks.
Implications of the CVE
The principal concern with CVE-2025-27625 is the threat of phishing attacks. Exploiting this vulnerability, attackers can deceive users into believing they are accessing a legitimate Jenkins resource. Instead, users might end up on a malicious site where sensitive information could be extracted or further malware installations could occur. Understanding the broader implications of this vulnerability is key for organizations relying on Jenkins for continuous integration and delivery.
Affected Versions
The following Jenkins versions are affected:
- Jenkins versions 2.499 and earlier
- LTS 2.492.1 and earlier
However, versions 2.492.2 and higher, as well as version 2.500, are confirmed as unaffected.
Mitigation Steps
To protect your systems from this vulnerability, consider the following mitigation strategies:
- Upgrade Jenkins: The most straightforward mitigation approach is to upgrade Jenkins to version 2.492.2 or later, or to version 2.500. These versions have addressed the redirection vulnerability.
- Monitor URL Redirects: Implement logging and monitoring for URLs redirected by Jenkins to detect any suspicious patterns or unauthorized redirects that could indicate an active exploit attempt.
- Security Advisory Reference: Refer to the official Jenkins Security Advisory 2025-03-05 for detailed information and updates regarding patches and recommendations directly from the Jenkins project.
Conclusion
Proactively addressing CVE-2025-27625 is crucial for maintaining the security integrity of Jenkins environments. By upgrading to the latest non-affected versions and being vigilant in monitoring redirect activity, organizations can significantly reduce the risk posed by this vulnerability. Staying informed and implementing the recommended actions can protect your operations from potential phishing scams.