CVE-2020-2111 Explained : Impact and Mitigation
Learn about CVE-2020-2111 affecting Jenkins Subversion Plugin versions <= 2.13.0. Understand the impact, exploitation mechanism, and mitigation steps for this cross-site scripting vulnerability.
Jenkins Subversion Plugin 2.13.0 and earlier versions are affected by a stored cross-site scripting vulnerability due to improper handling of error messages in the Project Repository Base URL field form validation.
Understanding CVE-2020-2111
This CVE identifies a security issue in Jenkins Subversion Plugin versions 2.13.0 and below.
What is CVE-2020-2111?
CVE-2020-2111 is a vulnerability in Jenkins Subversion Plugin that allows for stored cross-site scripting attacks.
The Impact of CVE-2020-2111
The vulnerability could be exploited by an attacker to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2020-2111
Jenkins Subversion Plugin 2.13.0 and earlier versions are susceptible to this security flaw.
Vulnerability Description
The issue arises from the failure to properly escape error messages in the Project Repository Base URL field form validation, enabling the injection of malicious scripts.
Affected Systems and Versions
- Product: Jenkins Subversion Plugin
- Vendor: Jenkins project
- Versions Affected: <= 2.13.0 (unspecified version type: custom)
Exploitation Mechanism
The vulnerability allows an attacker to input malicious scripts into the Project Repository Base URL field, which, when executed, can lead to cross-site scripting attacks.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2020-2111.
Immediate Steps to Take
- Upgrade Jenkins Subversion Plugin to a patched version above 2.13.0.
- Avoid inputting untrusted data into the Project Repository Base URL field.
Long-Term Security Practices
- Regularly monitor and update Jenkins plugins to ensure the latest security patches are applied.
- Educate users on safe coding practices to prevent cross-site scripting vulnerabilities.
Patching and Updates
- Jenkins project has likely released patches addressing this vulnerability. Ensure timely installation of these updates to secure your systems.