CVE-2024-29035
Umbraco's Blind SSRF Leads to Port Scan by using Webhooks
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Umbraco's Blind SSRF Leads to Port Scan by using Webhooks
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.
- Record
CVE-2024-29035- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2024-1136
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.
- Record
EUVD-2024-1136- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-74p6-39f2-23v3
Blind SSRF Leads to Port Scan by using Webhooks
Impact
Failing webhooks logs are available when solution is not in debug mode. Those logs can contain information that is critical.
Affected Versions
Umbraco versions 13.0.0 - 13.1.1
Patches
13.1.1
Workarounds
Disabling webhooks functionality.
- Record
GHSA-74p6-39f2-23v3- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2024-29035- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
Umbraco's Blind SSRF Leads to Port Scan by using Webhooks
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.
- Record
CVE-2024-29035- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSVGHSA-74p6-39f2-23v3
Blind SSRF Leads to Port Scan by using Webhooks
Impact
Failing webhooks logs are available when solution is not in debug mode. Those logs can contain information that is critical.
Affected Versions
Umbraco versions 13.0.0 - 13.1.1
Patches
13.1.1
Workarounds
Disabling webhooks functionality.
- Record
GHSA-74p6-39f2-23v3- CVSS 3.1
- 4.1 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.Cms.CoreNuGet |
13.0.0 up to 13.1.1 | 13.1.1 |
Umbraco.Cms.Web.BackOfficeNuGet |
13.0.0 up to 13.1.1 | 13.1.1 |
Umbraco.Cms.CoreNuGet |
13.0.0 up to 13.1.1, plus listed versions 13.0.113.0.213.0.313.1.013.1.0-rc |
13.1.1 |
Umbraco.Cms.Web.BackOfficeNuGet |
13.0.0 up to 13.1.1, plus listed versions 13.0.113.0.213.0.313.1.013.1.0-rc |
13.1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-29035 is a medium vulnerability (CVSS 4.1) in Umbraco Cms, published April 17, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in Umbraco.Cms.Core 13.1.1.
References
github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-74p6-39f2-23v3
nvd.nist.gov/vuln/detail/CVE-2024-29035