Umbraco CMS Improper Access Control Vulnerability Allows Low-Privilege Users to Access Webhook API

published 2024-10-22 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-2935 , GHSA-4gp9-ff99-j6vj

cvss: 0.0; 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 32%
public exploits: 0; none known

Umbraco, a free and open source .NET content management system, has an improper access control issue starting in version 14.0.0 and prior to version 14.3.0. The issue allows low-privilege users to access the webhook API and retrieve information that should be restricted to users with access to the settings section. Version 14.3.0 contains a patch.

Patch / fix

fixed in 2

nuget Umbraco.CMS 14.3.0
umbraco umbraco_cms 14.3.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-22)

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	0.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
GitHub	3.1	0.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	Umbraco.CMS	>=14.0.0, <14.3.0	14.3.0

Affected products

umbraco Umbraco-CMS

Classification

Weakness

CWE-284 Improper Access Control
CWE-863 Incorrect Authorization

References

github.com /umbraco/Umbraco-CMS/security/advisories/GHSA-4gp9-ff99-j6vj
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2024-48925
advisory
github.com /umbraco/Umbraco-CMS
package

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.

Summary