TI-2020-04739 Aliases CVE-2020-5811 GHSA-936x-wgqv-hhgq

Path traversal in Umbraco CMS

MEDIUM 41CWE-22Published 2020-12-30 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

An authenticated path traversal vulnerability exists during package installation in Umbraco CMS <= 8.9.1 or current, which could result in arbitrary files being written outside of the site home and expected paths when installing an Umbraco package.

Why it matters now

EPSS 0.09481 95th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD

Fix Fixed UmbracoCms (NuGet): 8.9.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Umbraco CMS	<= 8.9.1 or current (unfixed)	—	No fix listed	CNA
—	UmbracoCms (NuGet)	before 8.9.2	8.9.2	Patch available	GHSA-936x-wgqv-hhgq

Umbraco CMS Vendor— Affected <= 8.9.1 or current (unfixed) Fixed in — No fix listed CNA
UmbracoCms (NuGet) Vendor— Affected before 8.9.2 Fixed in 8.9.2 Patch available GHSA-936x-wgqv-hhgq

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:umbraco:umbraco_cms::::::::	up to 8.9.1	Vulnerable	umbraco

cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions up to 8.9.1 Vulnerable ·umbraco

Remediation

Fix · GHSA-936x-wgqv-hhgq UmbracoCms (NuGet) Fixed in 8.9.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2020-5811
2026-10-03 Alias added: GHSA-936x-wgqv-hhgq

References

Exploit 2

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2020-5811

TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4

See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences