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Fencer Vulns
medium 4.1

CVE-2024-29035 json

Umbraco's Blind SSRF Leads to Port Scan by using Webhooks

published 2024-04-17 2 y ago modified 2026-09-10 1 mo ago also EUVD-2024-1136 , GHSA-74p6-39f2-23v3

cvss
4.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

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.

Patch / fix

  • nuget Umbraco.Cms.Core 13.1.1
  • nuget Umbraco.Cms.Web.BackOffice 13.1.1
  • umbraco umbraco_cms 13.1.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
GitHub 3.1 4.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
nuget Umbraco.Cms.Core
>=13.0.0, <13.1.1
13.1.1
nuget Umbraco.Cms.Web.BackOffice
>=13.0.0, <13.1.1
13.1.1

Affected products

  • umbraco Umbraco-CMS
  • umbraco umbraco_cms

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.