CVE-2020-2290 : What You Need to Know
Learn about CVE-2020-2290 affecting Jenkins Active Choices Plugin 2.4 and earlier versions, allowing stored cross-site scripting attacks by attackers with Job/Configure permission.
Jenkins Active Choices Plugin 2.4 and earlier versions are affected by a stored cross-site scripting (XSS) vulnerability. Attackers with Job/Configure permission can exploit this issue.
Understanding CVE-2020-2290
Jenkins Active Choices Plugin 2.4 and earlier versions are prone to a stored XSS vulnerability due to unescaped return values of sandboxed scripts for Reactive Reference Parameters.
What is CVE-2020-2290?
This CVE refers to a vulnerability in Jenkins Active Choices Plugin versions 2.4 and below, allowing attackers with specific permissions to execute stored XSS attacks.
The Impact of CVE-2020-2290
The vulnerability enables attackers with Job/Configure permission to execute malicious scripts, potentially leading to unauthorized data access or manipulation within Jenkins instances.
Technical Details of CVE-2020-2290
Jenkins Active Choices Plugin 2.4 and earlier versions are susceptible to a stored XSS vulnerability.
Vulnerability Description
The issue arises from the lack of proper escaping of return values from sandboxed scripts for Reactive Reference Parameters, facilitating stored XSS attacks.
Affected Systems and Versions
- Product: Jenkins Active Choices Plugin
- Vendor: Jenkins project
- Versions Affected: <= 2.4 (unspecified version type: custom)
Exploitation Mechanism
Attackers with Job/Configure permission can exploit the vulnerability by injecting malicious scripts through Reactive Reference Parameters.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2020-2290.
Immediate Steps to Take
- Upgrade Jenkins Active Choices Plugin to a patched version above 2.4 to prevent exploitation.
- Restrict Job/Configure permissions to trusted users only.
Long-Term Security Practices
- Regularly monitor and audit Jenkins plugins for security vulnerabilities.
- Educate users on safe scripting practices and the risks of XSS attacks.
Patching and Updates
- Stay informed about security advisories and promptly apply patches released by Jenkins project to address known vulnerabilities.