Mozilla published a security advisory highlighting a vulnerability in the following product on the 5th of April 2022. It is recommended that you take the necessary precautions by ensuring your products are always updated.
Thunderbird versions prior to 91.8
For more information on this update, you can follow this URL:
https://www.mozilla.org/en-US/security/advisories/mfsa2022-15/
The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary.
PDF Download: Mozilla Security Advisory.pdf
References
Mozilla Security Advisory (7th April 2022). Retrieved from Canadian Centre for Cyber Security.
https://cyber.gc.ca/en/alerts/mozilla-security-advisory-av22-188
Mozilla Security Advisory (5th April 2022). Retrieved from Mozilla.
https://www.mozilla.org/en-US/security/advisories/