Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.
{ "binaries": [ { "binary_name": "firefox", "binary_version": "129.0.1+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-dev", "binary_version": "129.0.1+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-geckodriver", "binary_version": "129.0.1+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "129.0.1+build1-0ubuntu0.20.04.1" } ], "availability": "No subscription required" }