Impact: High
TLP Rating: Clear 
CERT Vanuatu (CERTVU) and the Office of the Chief Information Officer (OGCIO) provide the following advisory.
Mozilla has released a security update to address a vulnerability in Firefox and Firefox ESR. An attacker could exploit this vulnerability to take control of an affected system
What to do?
CERT Vanuatu encourages users and administrators to review Mozilla Security Advisory MFSA 2023-26 and apply the necessary update.
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-23/
- https://www.cisa.gov/news-events/alerts/2023/07/11/mozilla-releases-security-update-firefox-and-firefox-esr
- 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