CVE-2020-5809

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Description

A stored XSS vulnerability exists in Umbraco CMS <= 8.9.1 or current. An authenticated user can inject arbitrary JavaScript code into iframes when editing content using the TinyMCE rich-text editor, as TinyMCE is configured to allow iframes by default in Umbraco CMS.

References

https://www.tenable.com/security/research/tra-2020-59

Details

Source: MITRE

Published: 2020-12-30

Updated: 2021-01-04

Type: CWE-79

Risk Information

CVSS v2

Base Score: 3.5

Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 6.8

Severity: LOW

CVSS v3

Base Score: 5.4

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

Impact Score: 2.7

Exploitability Score: 2.3

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* versions up to 8.9.1 (inclusive)