CVE-2020-2227: 
Java vulnerability analysis and mitigation

Jenkins Deployer Framework Plugin, a framework plugin allowing other plugins to provide artifact deployment capabilities, was found to contain a stored cross-site scripting (XSS) vulnerability (CVE-2020-2227). The vulnerability was discovered in version 1.2 and earlier versions, where the plugin failed to properly escape URLs displayed on the build home page (Jenkins Advisory, OSS Security).

The vulnerability is classified as a stored cross-site scripting (XSS) issue with a CVSS v3.1 Base Score of 5.4 (Medium) and vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. The core issue stems from the plugin's failure to properly escape URLs that are displayed in the build home page, potentially allowing malicious script injection (NVD).

The vulnerability could potentially allow attackers to execute malicious scripts in the context of other users' browsers who view the affected build home page. However, the Jenkins security team noted that the exploitability depends on the specific implementation using the Deployer Framework Plugin, and they were not aware of any exploitable implementations at the time of disclosure (Jenkins Advisory).

The vulnerability is exploitable by users who have the ability to provide location URLs in the build process. The actual exploitation potential varies depending on the specific implementation using the Deployer Framework Plugin (Jenkins Advisory).

The vulnerability was fixed in Deployer Framework Plugin version 1.3, which properly escapes the URLs displayed on the build home page. Users are advised to upgrade to this version or later to address the security issue (Jenkins Advisory).