Security Update for firefox-esr

firefox-esr Updated 02 Oct 2025

Summary

23/09/2022
N/A
Yes i
Unrated
Not published

DSA-5237-1: firefox-esr - security update. Affects firefox-esr versions < 102.3.0esr-1~deb11u1. Fixed in 102.3.0esr-1~deb11u1. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Devnack Mobile apps built by Devnack Design, build and launch iOS and Android apps with a senior product team. From idea to store release Start a project

Background

firefox-esr is a web browser developed by Mozilla. It is the extended support release (ESR) version of Firefox, which means it receives long-term support and stability updates. The package is widely used for browsing the internet and accessing web-based applications.

Vulnerability Detail

Multiple security issues have been discovered in firefox-esr. These vulnerabilities could potentially allow an attacker to execute arbitrary code, bypass content security policy (CSP), or perform session fixation attacks. The specific vulnerabilities and their impact are as follows:

  • CVE-2022-3266: [Brief description of the vulnerability and its impact]
  • CVE-2022-40956: [Brief description of the vulnerability and its impact]
  • CVE-2022-40957: [Brief description of the vulnerability and its impact]
  • CVE-2022-40958: [Brief description of the vulnerability and its impact]
  • CVE-2022-40959: [Brief description of the vulnerability and its impact]
  • CVE-2022-40960: [Brief description of the vulnerability and its impact]
  • CVE-2022-40962: [Brief description of the vulnerability and its impact]

How To Fix

Minimum fixed version

102.3.0esr-1~deb11u1

This is the first release that contains the fix.

sudo apt-get install --only-upgrade firefox-esr

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

Workaround

There are no known workarounds for these vulnerabilities. It is crucial to apply the security update as soon as possible to mitigate the risks.

Conclusion

Multiple security vulnerabilities have been identified in the firefox-esr web browser. These vulnerabilities could lead to arbitrary code execution, CSP bypass, or session fixation attacks. It is crucial to update your firefox-esr package to version 102.3.0esr-1~deb11u1 or later to mitigate these risks. For further assistance or support in vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for firefox-esr →

Share this vulnerability

FAQ

Firefox ESR (Extended Support Release) is a version of Mozilla Firefox that receives long-term support and stability updates. It is designed for organizations and enterprises that require a more controlled and predictable web browsing environment.

These vulnerabilities could allow an attacker to execute arbitrary code on a user's system, bypass content security policies, or perform session fixation attacks. This could lead to unauthorized access to sensitive information, compromise of user accounts, or the installation of malware.

You can use the Vulert Playground at Vulert Scanner to check if your firefox-esr package is affected by these vulnerabilities. Simply upload your package manifest file (e.g., package-lock.json) to the playground, and it will analyze and alert you in real-time if any vulnerabilities are found.

Unfortunately, there are no known workarounds for these vulnerabilities. It is essential to apply the provided security update to protect your system from potential exploitation.

You can visit the security tracker page for firefox-esr at https://security-tracker.debian.org/tracker/firefox-esr to get detailed information about its security status, including the list of fixed vulnerabilities.

Related vulnerabilities

Recent vulnerabilities recorded for firefox-esr.

How To Fix

Minimum fixed version

102.3.0esr-1~deb11u1

This is the first release that contains the fix.

sudo apt-get install --only-upgrade firefox-esr

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback

Follow Vulert in Google

Get more Vulert vulnerability and dependency-security updates in Google Search and AI results.