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MEDIUM

CVE-2020-5810

CVSS v3

5.4

MEDIUM

EPSS Score

62.0 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2020-5810 yet.

Full record on NVD

Description

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.

Technical details

Published
2020-12-30

Frequently asked questions

What is CVE-2020-5810?

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user authorized to upload media can upload a malicious .svg file which act as a stored XSS payload.

Is CVE-2020-5810 actively exploited?

Active exploitation of CVE-2020-5810 has not been confirmed. Its EPSS score was 62.0% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-5810?

CVE-2020-5810 has a CVSS v3 base score of 5.4 (MEDIUM severity).

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