CVE-2021-21628 : Security Advisory and Response
Learn about CVE-2021-21628 affecting Jenkins Build With Parameters Plugin versions 1.5 and earlier, allowing attackers to execute cross-site scripting attacks. Find mitigation steps and security best practices.
Jenkins Build With Parameters Plugin 1.5 and earlier versions are affected by a stored cross-site scripting (XSS) vulnerability due to a failure to escape parameter names and descriptions. This vulnerability can be exploited by attackers with Job/Configure permission.
Understanding CVE-2021-21628
This section provides insights into the impact and technical details of CVE-2021-21628.
What is CVE-2021-21628?
CVE-2021-21628 is a security flaw in Jenkins Build With Parameters Plugin versions 1.5 and earlier that allows stored cross-site scripting attacks by attackers with specific permission levels.
The Impact of CVE-2021-21628
The vulnerability exposes organizations to the risk of cross-site scripting attacks, potentially leading to unauthorized data disclosure, data modification, or other malicious activities by exploiting the plugin's lack of parameter name and description escaping.
Technical Details of CVE-2021-21628
This section outlines the specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises from a lack of proper parameter name and description escaping within Jenkins Build With Parameters Plugin versions 1.5 and below, enabling stored cross-site scripting attacks.
Affected Systems and Versions
The affected systems include all instances running Jenkins Build With Parameters Plugin versions 1.5 and earlier.
Exploitation Mechanism
Attackers with Job/Configure permission can exploit this vulnerability by injecting malicious scripts into parameter names and descriptions, potentially executing unauthorized actions on the affected Jenkins instances.
Mitigation and Prevention
To address and prevent the exploitation of CVE-2021-21628, immediate steps and long-term security practices are recommended.
Immediate Steps to Take
Organizations should update Jenkins Build With Parameters Plugin to a secure version, validate and sanitize user inputs, and restrict Job/Configure permissions to authorized users only.
Long-Term Security Practices
Implement regular security assessments, educate users on secure coding practices, and maintain awareness of plugin updates and security advisories.
Patching and Updates
Stay informed about security patches and updates released by Jenkins project for the Build With Parameters Plugin to mitigate the risk posed by CVE-2021-21628.