CVE-2024-29035 Umbraco's Blind SSRF Leads to Port Scan by using Webhooks
Attackers can perform blind SSRF port scans via webhooks in Umbraco CMS, potentially exposing critical information from logs.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-29035?
CVE-2024-29035 is a medium-severity server-side request forgery vulnerability in Umbraco Umbraco Cms, published on 17 Apr 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Umbraco is an ASP.NET CMS. Failing webhooks logs are available when solution is not in debug mode. Those logs can contain information that is critical. This vulnerability is fixed in 13.1.1.
Weakness: CWE-918
Which versions are affected by CVE-2024-29035?
4 open source packages ship an affected version, including Umbraco.Cms.Core and Umbraco.Cms.Web.BackOffice. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms.Core NuGet | From 13.0.0 | 13.1.1 |
Umbraco.Cms.Core NuGet | From 13.0.0 | 13.1.1 |
Umbraco.Cms.Web.BackOffice NuGet | From 13.0.0 | 13.1.1 |
Umbraco.Cms.Web.BackOffice NuGet | From 13.0.0 | 13.1.1 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2024-29035?
Upgrade Umbraco.Cms.Core to 13.1.1 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2024-29035 being exploited?
There is no known exploitation of CVE-2024-29035 in the wild and no public exploit code.
Other vulnerabilities in Umbraco Umbraco Cms
- CVE-2025-67288 Umbraco CMS has an arbitrary file upload vulnerability
- CVE-2014-10074 File upload in n/a
- CVE-2012-1301 Server-side request forgery in n/a
- CVE-2012-10054 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
- CVE-2025-32017 Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users
Sources
Also known as GHSA-74p6-39f2-23v3.