CVE-2021-29970

High

Description

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Mozilla Firefox

PublishedAug 5, 2021

First seenAug 5, 2021

How to fix

Update

mozilla firefox90.0 or later
mozilla firefox_esr78.12 or later
mozilla thunderbird78.12 or later

Vendor advisories

security.gentoo.org/glsa/202202-03
security.gentoo.org/glsa/202208-14

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 90.0	90.0
mozilla firefox_esr	v < 78.12	78.12
mozilla thunderbird	v < 78.12	78.12

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