CVE-2025-9824
📋 TL;DR
This vulnerability allows attackers to determine whether specific usernames exist in a system by measuring differences in login response times. This enables user enumeration, which can facilitate targeted brute-force attacks. All systems running vulnerable versions of the affected software are at risk.
💻 Affected Systems
- Mautic
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers enumerate all valid usernames and successfully brute-force credentials, gaining unauthorized access to multiple accounts and potentially compromising sensitive data or systems.
Likely Case
Attackers identify valid usernames and conduct targeted password attacks, increasing the likelihood of credential compromise for some accounts.
If Mitigated
With rate limiting and strong password policies, attackers may enumerate some usernames but fail to compromise accounts due to authentication controls.
🎯 Exploit Status
Exploitation requires precise timing measurements but no authentication. Attackers need to send multiple login requests and analyze response times.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version implementing TimingSafeFormLoginAuthenticator
Vendor Advisory: https://github.com/mautic/mautic/security/advisories/GHSA-3ggv-qwcp-j6xg
Restart Required: No
Instructions:
1. Identify your current Mautic version. 2. Upgrade to the patched version that includes TimingSafeFormLoginAuthenticator. 3. Verify the fix by testing login response times.
🔧 Temporary Workarounds
No workarounds available
allThe vendor states no workarounds exist. Patching is required.
🧯 If You Can't Patch
- Implement rate limiting on login endpoints to slow down enumeration attempts
- Deploy web application firewalls (WAFs) with rules to detect timing-based enumeration patterns
🔍 How to Verify
Check if Vulnerable:
Test login response times with valid vs. invalid usernames. If response times differ significantly, the system is vulnerable.Check Version:
Check Mautic version in admin panel or via application configuration filesVerify Fix Applied:
After patching, test login response times again. Response times should be consistent regardless of username validity.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts with varied usernames from single IPs
- Unusual patterns of login requests with timing consistency
Network Indicators:
- High volume of POST requests to login endpoints
- Requests with systematically varied username parameters
SIEM Query:
source="web_logs" action="POST" path="/login" | stats count by src_ip, username | where count > threshold