CVE-2025-0549
📋 TL;DR
This vulnerability allows attackers to bypass Device OAuth flow protections in GitLab, enabling unauthorized authorization form submissions with minimal user interaction. It affects GitLab Community Edition (CE) and Enterprise Edition (EE) installations running vulnerable versions. Attackers could potentially gain unauthorized access to GitLab accounts or resources.
💻 Affected Systems
- GitLab Community Edition
- GitLab Enterprise Edition
📦 What is this software?
Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →Gitlab by Gitlab
GitLab is a complete DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and collaboration tools used by millions of developers and thousands of enterprises worldwide. As both a cloud-hosted SaaS offering (GitLab.com) and self-managed software, G...
Learn more about Gitlab →⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain unauthorized access to GitLab accounts, potentially compromising source code, CI/CD pipelines, and sensitive project data.
Likely Case
Attackers could bypass authentication controls to access GitLab resources they shouldn't have permission to access, potentially leading to data exposure or unauthorized actions.
If Mitigated
With proper access controls and monitoring, impact would be limited to attempted unauthorized access that could be detected and blocked.
🎯 Exploit Status
Requires some user interaction but minimal. Attackers need to trick users into performing specific actions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 17.9.8, 17.10.6, or 17.11.2
Vendor Advisory: https://gitlab.com/gitlab-org/gitlab/-/issues/513996
Restart Required: Yes
Instructions:
1. Backup your GitLab instance. 2. Update to GitLab 17.9.8, 17.10.6, or 17.11.2 depending on your current version. 3. Restart GitLab services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Disable Device OAuth Flow
allTemporarily disable the vulnerable Device OAuth flow feature
Edit GitLab configuration to disable Device OAuth flow
Restrict Access
allLimit GitLab access to trusted networks only
Configure firewall rules to restrict GitLab access
🧯 If You Can't Patch
- Implement strict network access controls to limit GitLab exposure
- Enable enhanced logging and monitoring for authentication events
🔍 How to Verify
Check if Vulnerable:
Check GitLab version via admin interface or command line. If version falls within affected ranges, system is vulnerable.Check Version:
sudo gitlab-rake gitlab:env:info | grep VersionVerify Fix Applied:
After patching, verify GitLab version is 17.9.8, 17.10.6, or 17.11.2 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual Device OAuth authentication attempts
- Multiple failed authentication events from same source
- Successful authentications from unexpected locations
Network Indicators:
- Unusual patterns in OAuth flow requests
- Multiple authentication requests in short timeframes
SIEM Query:
source="gitlab" AND (event="authentication" OR event="oauth") AND status="success" AND user_agent CONTAINS suspicious_pattern