How the CVE Works:
The CSRF vulnerabilities in wallabag (prior to 2.6.11) allow attackers to forge malicious requests via crafted links or pages. When a logged-in user visits such a page, their browser automatically sends authenticated requests to vulnerable wallabag endpoints (e.g., /generate-token, /delete/{id}). Since these endpoints lacked CSRF protections, the server processes the requests as legitimate, enabling unauthorized actions like token generation, entry deletion, or configuration changes. The attack exploits the trust between the user’s browser and wallabag, requiring no direct interaction beyond visiting a malicious site.
DailyCVE Form:
Platform: wallabag
Version: <2.6.11
Vulnerability: CSRF
Severity: Medium
Date: 2023-XX-XX
What Undercode Say:
Exploitation:
1. Craft Malicious HTML:
<form action="https://victim-wallabag/generate-token" method="GET"> <input type="submit" value="Click for Free Ebook"> </form>
2. Trigger Actions:
curl -X GET 'https://victim-wallabag/delete/123' -H 'Cookie: PHPSESSID=stolen'
Protection:
1. Upgrade:
docker pull wallabag/wallabag:2.6.11
2. CSRF Tokens:
// Example PHP mitigation
if (!hash_equals($_SESSION['csrf_token'], $_POST['csrf_token'])) {
die("CSRF validation failed.");
}
3. Web Server Rules:
Enforce POST for sensitive endpoints
location ~ (/delete/|/generate-token) {
limit_except POST { deny all; }
}
4. Browser Headers:
Header always set X-Frame-Options "DENY" Header always set Content-Security-Policy "frame-ancestors 'none'"
Detection:
1. Audit Logs:
grep -r "GET /delete/" /var/log/wallabag/
2. Patch Check:
php bin/console wallabag:version | grep "2.6.11"
References:
Rule: No extra words. Analytics complete.
References:
Reported By: https://github.com/advisories/GHSA-5pm7-cp8f-p2c2
Extra Source Hub:
Undercode
