The vulnerability of the IonMonkey JIT-compiler for Firefox and Firefox ESR browsers lies in the access to resources through incompatible types. This allows attackers to gain access to confidential data, compromise its integrity, and cause service failures.
🗓️ 20 Jan 2020 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 6 Views
| Reporter | Title | Published | Views | Family All 207 |
|---|---|---|---|---|
 | Mozilla Firefox 72 IonMonkey - JIT Type Confusion Exploit | 13 May 202100:00 | – | zdt |
| Mozilla Firefox 67 - Array.pop JIT Type Confusion Exploit | 2 Feb 202200:00 | – | zdt |
 | Security fix for the ALT Linux 10 package thunderbird version 68.4.1-alt1 | 11 Jan 202000:00 | – | altlinux |
 | Exploit for Type Confusion in Mozilla Firefox | 27 Aug 202019:32 | – | githubexploit |
 | Mozilla Firefox < 72.0.1 Type Confusion (mfsa2020-03) | 8 Jan 202000:00 | – | nessus |
| Mozilla Firefox ESR < 68.4.1 Type Confusion (mfsa2020-03) | 8 Jan 202000:00 | – | nessus |
| Amazon Linux 2 : thunderbird (ALAS-2020-1393) | 13 Feb 202000:00 | – | nessus |
| CentOS 8 : firefox (CESA-2020:0111) | 1 Feb 202100:00 | – | nessus |
| CentOS 7 : firefox (RHSA-2020:0085) | 16 Jan 202000:00 | – | nessus |
| CentOS 6 : firefox (RHSA-2020:0086) | 15 Jan 202000:00 | – | nessus |
10
Node
OR
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
22 Oct 2025 00:00Current
8High risk
Vulners AI Score8
CVSS 38.8
CVSS 210
EPSS0.4685