A security issue has been found in Firefox before 83.0 where, when listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code.
A security issue has been found in Firefox before 83.0 where, when listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26967 https://bugzilla.mozilla.org/show_bug.cgi?id=1665820
Vulmon