CVE-2020-29454

Name: CVE-2020-29454
Creator: NVD / NIST
Published: 2020-12-02T02:15:11.97+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2020-29454 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Editors/LogViewerController.cs in Umbraco through 8.9.1 allows a user to visit a logviewer endpoint even if they lack Applications.Settings access.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.90%

54.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Umbraco	Umbraco Cms	>= 8.0.0, <= 8.9.1

References

https://github.com/umbraco/Umbraco-CMS/pull/9361Third Party Advisory
https://github.com/umbraco/Umbraco-CMS/pull/9361Third Party Advisory

Timeline

Published: Dec 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-29454?

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

How severe is CVE-2020-29454?

CVE-2020-29454 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2020-29454?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-29454?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST