Impact: High
TLP Rating: Clear 
CERT Vanuatu (CERTVU) and the Office of the Chief Information Officer (OGCIO) provide the following advisory.
Mozilla has released security advisories to address vulnerabilities in Thunderbird, Firefox, and Firefox ESR. A cyber threat actor could exploit some of these vulnerabilities to take control of an affected system.
What to do?
CERT Vanuatu encourages all administrators and users to review the following advisories and apply the necessary updates.
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-23/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-23/
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-23/
- Download advisory (English): Security Advisories for Thunderbird, Firefox, And Firefox ESR.
- Download advisory (French): Avis de sécurité Thunderbird, Firefox et Firefox ESR
- Download advisory (Bislama): Olgeta Sekuriti Advaeseri blong Thunderbird, Firefox, mo Firefox ESR