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

Below is a complete list of vulnerabilities:

  1. A memory safety vulnerability can be exploited to execute arbitrary code.
  2. An information disclosure vulnerability can be exploited via special crafted webpage to obtain sensitive information.
  3. A security UI vulnerability can be exploited via special crafted extention to spoof user interface and obtain sensitive information.
  4. An out of bounds read vulnerability in WebGL can be exploited via special crafted object to cause denial of service or obtain sensitive information.
  5. A security bypass vulnerability in Angle graphics library can be exploited to bypass security restrictions.

Original advisories

Related products

CVE list

  • CVE-2021-23987
  • CVE-2021-23982
  • CVE-2021-23984
  • CVE-2021-23981
  • CVE-2021-4127

Read more

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com

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