CVE-2020-2116: 
Java vulnerability analysis and mitigation

CVE-2020-2116 is a security vulnerability discovered in the Jenkins Pipeline GitHub Notify Step Plugin version 1.0.4 and earlier, disclosed on February 12, 2020. The vulnerability is related to missing permission checks and CSRF protection in form validation functionality. This vulnerability affects Jenkins installations using the Pipeline GitHub Notify Step Plugin (Jenkins Advisory).

The vulnerability stems from two key issues in the Pipeline GitHub Notify Step Plugin: a Cross-Site Request Forgery (CSRF) vulnerability and missing permission checks on a method implementing form validation. The severity of this vulnerability is rated as High according to CVSS scoring. The vulnerability allows users with Overall/Read access to Jenkins to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method (Jenkins Advisory).

The vulnerability enables attackers to capture credentials stored in Jenkins through unauthorized access. Users with basic Overall/Read access could potentially exploit this vulnerability to connect to malicious URLs using stolen credential IDs, leading to potential credential theft and unauthorized access to sensitive information (Jenkins Advisory).

The vulnerability has been fixed in Pipeline GitHub Notify Step Plugin version 1.0.5. The fix implements proper permission checks requiring POST requests and Item/Configure permission for the form validation method. Organizations using affected versions should upgrade to version 1.0.5 or later to mitigate this security risk (Jenkins Advisory).