If the "app.support.baseURL" preference is changed by a malicious local program to contain HTML and script content, this content is not sanitized. It will be executed if a user loads "chrome://browser/content/preferences/in-content/preferences.xul" directly in a tab and executes a search. This stored preference is also executed whenever an EME video player plugin displays a CDM-disabled message as a notification message. This vulnerability affects Firefox < 59.

Related CVEs

CVE-2018-5133

Key Information

GHSA ID

GHSA-9rwp-r33f-q36c

Published

May 14, 2022 3:10 AM

Last Modified

May 14, 2022 3:10 AM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: June 12, 2025 6:24 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.