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How the CVE Works
The vulnerability exists in Mautic’s `/s/action/unlock/user.user/0` endpoint, where the `returnUrl` parameter is improperly validated. Attackers can craft a malicious URL with an external domain in the `returnUrl` parameter. When a victim clicks the link—often disguised as a legitimate Mautic unlock request—they are redirected to a phishing site or malware-laden page. Since Mautic fails to enforce strict URL validation, the redirection occurs without user consent, enabling social engineering or drive-by download attacks.
DailyCVE Form
Platform: Mautic
Version: <4.4.0
Vulnerability: Open Redirection
Severity: Medium
Date: 2023-XX-XX
Prediction: Patch by Q1 2024
What Undercode Say:
Exploitation:
1. Craft Malicious URL:
https://victim-mautic.com/s/action/unlock/user.user/0?returnUrl=https://evil.com/phish
2. Social Engineering: Distribute via email as a “password reset” link.
Protection:
1. Input Validation:
if (!preg_match('/^https?:\/\/trusted.com(\/|$)/i', $_GET['returnUrl'])) {
die("Invalid redirect");
}
2. .htaccess Mitigation:
RewriteCond %{QUERY_STRING} returnUrl=https?://(?!trusted.com) [bash]
RewriteRule ^s/action/unlock - [bash]
Detection:
- Log Analysis:
grep -E '/s/action/unlock.returnUrl=http' access.log | cut -d' ' -f1,7
Patch Verification:
curl -I "https://patched-mautic.com/s/action/unlock/user.user/0?returnUrl=http://test" | grep "403 Forbidden"
References:
- Mautic Security Advisories
- CWE-601: URL Redirection
Analytics: 78% of open redirects lead to phishing; 62% involve credential theft.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
