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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. This vulnerability affects Firefox < 83.
Base Score: 4.3
Impact Score: 2.9
Exploitability Score: 8.6
Base Score: 6.5
Impact Score: 3.6
Exploitability Score: 2.8
|143127||Ubuntu 16.04 LTS : Firefox vulnerabilities (USN-4637-2)||Nessus||Ubuntu Local Security Checks|
|143121||Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Firefox vulnerabilities (USN-4637-1)||Nessus||Ubuntu Local Security Checks|
|142911||Mozilla Firefox < 83.0||Nessus||MacOS X Local Security Checks|
|142910||Mozilla Firefox < 83.0||Nessus||Windows|