Incorrect permission enforcement in UmbracoCms

published 2020-12-02 5y ago modified 2026-09-10 last mo. also GHSA-4vp3-vfww-8648 , EUVD-2021-0761

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

Editors/LogViewerController.cs in Umbraco through 8.9.1 allows a user to visit a logviewer endpoint even if they lack Applications.Settings access.

Patch / fix

fixed in 1 links 1

nuget UmbracoCms 8.10.0

github.com/umbraco/Umbraco-CMS#9361 pull request

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Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	UmbracoCms	<8.10.0	8.10.0

Classification

Weakness

CWE-863 Incorrect Authorization
CWE-732 Incorrect Permission Assignment for Critical Resource

References

github.com /umbraco/Umbraco-CMS/pull/9361
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-29454
advisory

Sources

Fencer Intel 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.