CVE-2025-68946
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in Gitea versions before 1.20.1 where attackers can inject malicious JavaScript via forbidden URL schemes like javascript: in links. This affects all Gitea instances running vulnerable versions, potentially compromising user sessions and data.
💻 Affected Systems
- Gitea
📦 What is this software?
Gitea by Gitea
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, deface content, or redirect users to malicious sites, leading to complete account compromise.
Likely Case
Attackers inject malicious scripts to steal session tokens or credentials from users who click on crafted links, potentially gaining unauthorized access.
If Mitigated
With proper input validation and output encoding, the risk is limited to minor content manipulation with no significant impact.
🎯 Exploit Status
Exploitation requires user interaction (clicking a malicious link) and typically authenticated access to create/modify content.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.20.1
Vendor Advisory: https://blog.gitea.com/release-of-1.20.1/
Restart Required: Yes
Instructions:
1. Backup your Gitea instance and database. 2. Download Gitea 1.20.1 from the official releases. 3. Stop the Gitea service. 4. Replace the Gitea binary with the new version. 5. Restart the Gitea service.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom input validation to reject or sanitize URL schemes like javascript: in user-generated content.
🧯 If You Can't Patch
- Disable user-generated content features that allow URL inputs.
- Implement a web application firewall (WAF) with XSS protection rules.
🔍 How to Verify
Check if Vulnerable:
Check the Gitea version via the web interface (Admin Dashboard) or by running './gitea --version' in the installation directory.Check Version:
./gitea --versionVerify Fix Applied:
Confirm the version is 1.20.1 or later and test that javascript: URLs are properly sanitized in links.📡 Detection & Monitoring
Log Indicators:
- Unusual content modifications, especially with javascript: URLs in repository or issue logs.
Network Indicators:
- HTTP requests containing javascript: scheme in URL parameters.
SIEM Query:
source="gitea.log" AND "javascript:"