Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-39878
CVE-2021-39878:
GitLab vulnerability analysis and mitigation
Overview
A stored Reflected Cross-Site Scripting (XSS) vulnerability was discovered in the Jira integration feature of GitLab versions 13.0 up to 14.3.1. The vulnerability, identified as CVE-2021-39878, was disclosed on September 30, 2021, and allowed attackers to execute arbitrary JavaScript code (GitLab Release, CVE Mitre).
Technical details
The vulnerability was rated as medium severity with a CVSS score of 5.8 (CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N). The issue stemmed from improper validation of the return_to parameter in the Jira Connect users controller, where the value was directly used as a link without proper sanitization (GitLab Release).
Impact
When exploited, this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of other users' browsers, potentially leading to session hijacking, data theft, or other malicious actions (GitLab Release).
Mitigation and workarounds
The vulnerability was patched in GitLab versions 14.3.1, 14.2.5, and 14.1.7. Users were strongly recommended to upgrade their GitLab installations to one of these versions immediately (GitLab Release).
Additional resources
Source: This report was generated using AI
Related GitLab vulnerabilities:
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