In short
- CVE-2020-5809 is a MEDIUM (CVSS 5.4) vulnerability affecting UmbracoCms.Core, umbraco cms (umbraco).
- Chance of exploitation in the next 30 days (EPSS): 0.69%, higher than 52.6% of all vulnerabilities.
- No patched version is listed yet: follow the vendor's advisory in References.
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.
NVD 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.
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