CVE-2020-2176: 
Java vulnerability analysis and mitigation

CVE-2020-2176 is a cross-site scripting (XSS) vulnerability discovered in the Jenkins useMango Runner Plugin. The vulnerability was disclosed on April 7, 2020, affecting versions 1.4 and earlier of the plugin. The issue stems from multiple form validation endpoints in the plugin that fail to properly escape values received from the useMango service (Jenkins Advisory, OSS Security).

The vulnerability is classified as a cross-site scripting (XSS) vulnerability (CWE-79) 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 CVSS v2.0 Base Score is 3.5 (Low) with vector string (AV:N/AC:M/Au:S/C:N/I:P/A:N). The vulnerability exists in form validation endpoints that process values from the useMango service without proper escaping (NVD).

The vulnerability allows for cross-site scripting attacks that can be exploited by users who have the ability to control the values returned from the useMango service. This could potentially lead to unauthorized access to sensitive information or execution of malicious scripts in the context of other users' browsers (Jenkins Advisory).

The vulnerability has been fixed in useMango Runner Plugin version 1.5, which properly escapes all values received from the useMango service in form validation messages. Users are advised to upgrade to this version to mitigate the vulnerability (Jenkins Advisory).