CVE-2020-5811

Umbraco Cms vulnerability

CVSS

6.5

EPSS

9.4%

EPSS pct

95th

Exploited

No known

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.

Affected vendor

Umbraco

Affected product

Umbraco Cms

CVSS vector

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

Weakness type (CWE)

CWE-22 — Path Traversal

Published

2020-12-30

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 9.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2020-5811

Confirm whether Umbraco Umbraco Cms is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-5811.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-5811

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-5811 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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