KLA12261
Multiple vulnerabilities in Mozilla Thunderbird

Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to obtain sensitive information, cause denial of service, gain privileges, spoof user interface.

Below is a complete list of vulnerabilities:

1. A type confusion vulnerability in JIT optimization can be exploited to obtain sensitive information.
2. A denial of service vulnerability in JIT can be exploited to cause denial of service.
3. A security UI vulnerability on Linux can be exploited to spoof user interface and gain privileges.

Mozilla Thunderbird earlier than 91

Update to the latest version
Download Thunderbird

MFSA2021-36