How the CVE Works:
The vulnerability in Umbraco CMS (CVE-2025-XXXX) allows restricted editor users to manipulate backoffice API URLs to access or delete media items and content they are not authorized to interact with. This occurs due to insufficient access controls in the backoffice API endpoints. Authenticated users with editor-level permissions can exploit this flaw by crafting specific API requests to bypass folder-level restrictions, enabling them to retrieve or delete content and media from unauthorized directories. The issue affects Umbraco versions <= 10.8.8 and >= 11.0.0-rc1, <= 13.7.0. Patches are available in versions 10.8.9 and 13.7.1.
DailyCVE Form:
Platform: Umbraco CMS
Version: <= 10.8.8, >= 11.0.0-rc1, <= 13.7.0
Vulnerability: Unauthorized Content Access/Deletion
Severity: Moderate
Date: Mar 11, 2025
What Undercode Say:
Exploitation:
- Crafting Malicious API Requests: Attackers can manipulate backoffice API URLs to access unauthorized content.
Example:
GET /umbraco/backoffice/api/media/delete?id=12345 HTTP/1.1 Host: target.com Authorization: Bearer <editor_token>
2. Bypassing Folder Restrictions: Editors can exploit insufficient access controls to delete or retrieve media from restricted folders.
Protection:
- Apply Patches: Upgrade to Umbraco versions 10.8.9 or 13.7.1.
composer update umbraco/umbraco-cms --with-dependencies
- Implement Access Controls: Enforce strict folder-level permissions for editor roles.
Example:
services.AddAuthorization(options =>
{
options.AddPolicy("RestrictMediaAccess", policy =>
policy.RequireClaim("FolderAccess", "Authorized"));
});
3. Audit API Endpoints: Regularly review and secure backoffice API endpoints.
Example:
[bash]
public IActionResult DeleteMedia(int id)
{
// Secure deletion logic
}
4. Monitor Logs: Track suspicious API requests and user activities.
Example:
tail -f /var/log/umbraco/access.log | grep "DELETE /umbraco/backoffice/api/media"
5. Use Web Application Firewalls (WAF): Deploy WAF rules to block unauthorized API requests.
Example:
location /umbraco/backoffice/api/ {
if ($http_authorization !~ "Bearer valid_token") {
return 403;
}
}
Analytics:
- Affected Systems: Umbraco CMS installations running vulnerable versions.
- Attack Vector: Authenticated backoffice users with editor permissions.
- Impact: Unauthorized content access and deletion, potential data loss.
- Mitigation Rate: High (patches available).
References:
- bash
- bash
By following these steps, organizations can mitigate the risk posed by CVE-2025-XXXX and secure their Umbraco CMS installations.
References:
Reported By: https://github.com/advisories/GHSA-wx5h-wqfq-v698
Extra Source Hub:
Undercode
