CVE-2022-1529

HIGH EXPLOITED IN THE WILD

Firefox < 100.0.2 and Firefox ESR < 91.9.1 - Prototype Pollution via Parent Process Message Handling

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2022-1529 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io).

Description

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

References (2)

Core 2
Core References
Issue Tracking, Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1770048

Scores

CVSS v3 8.8
EPSS 0.1710
EPSS Percentile 96.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

VulnCheck KEV 2022-08-15
InTheWild.io 2022-08-15
CWE
CWE-1321
Status published
Products (3)
mozilla/firefox < 100.0.2
mozilla/firefox_esr < 91.9.1
mozilla/thunderbird < 91.9.1
Published Dec 22, 2022
Tracked Since Feb 18, 2026