CVE-2022-28282

MEDIUM

Firefox < 99.0 and Firefox ESR < 91.8 - Use-After-Free via Localization Link

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2022-28282. PoCs published by bb33bb.

AI-analyzed exploit summary This PoC exploits a heap-use-after-free vulnerability in Firefox (CVE-2022-28282) by manipulating the 'then' getter in Object's prototype to trigger a callback during Promise resolution, leading to a UAF in DocumentL10n::TranslateDocument. The exploit requires a Web Extension context due to privilege checks.

Description

By using a link with <code>rel="localization"</code> a use-after-free could have been triggered by destroying an object during JavaScript execution and then referencing the object through a freed pointer, leading to a potential exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

Exploits (1)

nomisec WORKING POC
by bb33bb · poc
https://github.com/bb33bb/CVE-2022-28282-firefox

This PoC exploits a heap-use-after-free vulnerability in Firefox (CVE-2022-28282) by manipulating the 'then' getter in Object's prototype to trigger a callback during Promise resolution, leading to a UAF in DocumentL10n::TranslateDocument. The exploit requires a Web Extension context due to privilege checks.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mozilla Firefox (versions affected by CVE-2022-28282)
No auth needed
Prerequisites: Web Extension context to bypass privilege checks
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4

Scores

CVSS v3 6.5
EPSS 0.0808
EPSS Percentile 92.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-416
Status published
Products (3)
mozilla/firefox < 99.0
mozilla/firefox_esr < 91.8
mozilla/thunderbird < 91.8
Published Dec 22, 2022
Tracked Since Feb 18, 2026