CVE-2026-25649
📋 TL;DR
This vulnerability allows authenticated users in Traccar GPS tracking systems to steal OAuth 2.0 authorization codes via open redirect in OIDC endpoints. Attackers can redirect these codes to malicious URLs, potentially enabling account takeover on OAuth-integrated applications. All Traccar deployments up to version 6.11.1 are affected.
💻 Affected Systems
- Traccar GPS Tracking System
📦 What is this software?
Traccar by Traccar
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover on any OAuth-integrated application, potentially leading to data theft, unauthorized access to connected systems, and lateral movement across integrated platforms.
Likely Case
Attackers steal OAuth authorization codes to gain unauthorized access to user accounts on integrated applications, potentially compromising GPS tracking data and user credentials.
If Mitigated
With proper redirect_uri validation and OAuth security controls, impact is limited to unsuccessful redirect attempts that would be logged and blocked.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once access is obtained. The vulnerability is well-documented in the security advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/traccar/traccar/security/advisories/GHSA-ccc7-4r59-4pp7
Restart Required: Yes
Instructions:
1. Monitor the Traccar GitHub repository for security updates. 2. Apply the official patch when available. 3. Restart the Traccar service after patching.
🔧 Temporary Workarounds
Implement redirect_uri validation
allAdd server-side validation to ensure redirect_uri parameters match whitelisted domains before processing OIDC requests.
# Requires code modification to validate redirect_uri against allowed domains
Disable OIDC endpoints temporarily
allTemporarily disable the vulnerable OIDC endpoints until a patch is available.
# Modify Traccar configuration to disable OIDC/OAuth integration
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Traccar servers from critical systems
- Enable detailed logging and monitoring for OIDC endpoint access and redirect attempts
🔍 How to Verify
Check if Vulnerable:
Check Traccar version via web interface or configuration files. Versions 6.11.1 and earlier are vulnerable.Check Version:
Check Traccar web interface or examine traccar.xml configuration file for version informationVerify Fix Applied:
After applying any fix, test OIDC redirect functionality with malicious redirect_uri parameters to ensure they are rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual redirect patterns in OIDC logs
- Multiple failed redirect attempts with external domains
- Authorization codes being sent to non-whitelisted domains
Network Indicators:
- HTTP 302 redirects to unexpected external domains from OIDC endpoints
- Traffic patterns showing authorization codes being sent to attacker-controlled servers
SIEM Query:
source="traccar" AND (url="*/oauth/*" OR url="*/oidc/*") AND (status=302 OR status=303) AND NOT dest_domain IN ["whitelisted-domains"]