FirefoxWeb browser · Mozilla
CVE-2022-45413
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedUsing the <code>S.browser_fallback_url parameter</code> parameter, an attacker could redirect a user to a URL and cause SameSite=Strict cookies to be sent.<br>*This issue only affects Firefox for Android. Other operating systems are not affected.*. This vulnerability affects Firefox < 107.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceFirefox for Android versions prior to 107 contain a SameSite cookie bypass vulnerability. The S.browser_fallback_url parameter can be manipulated to redirect users to an attacker-controlled URL while still permitting SameSite=Strict cookies to be sent with the request, bypassing the intended SameSite cookie protection mechanism.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
FirefoxWeb browser
< 107.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if Firefox for Android is installedCheck the device for the Firefox browser app - look for 'Firefox' or 'Firefox Nightly' in the app drawer or installed apps listAffected if Firefox for Android is not installed on the device
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Determine the installed Firefox for Android versionOpen Firefox for Android, tap the three-dot menu, go to Settings, scroll to the bottom and tap 'About Firefox' to display the version numberAffected if The displayed version number is less than 107.0 (for example, 106.0, 106.1, etc.)
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Verify the exact version for clarityNote the full version string shown in the About screen (for example, '106.1' or '106.0.1')Affected if Any version below 107.0 (including 106.x, 105.x, and earlier releases)
The user is affected if Firefox for Android is installed with any version number below 107.0.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped107.0
Update Firefox for Android to version 107 or later. No application-level changes are required as this is a browser vulnerability.
Firefox 107.0 (or later) for Android
- 1. Open Firefox for Android on the device
- 2. Navigate to the menu and select 'Settings'
- 3. Tap on 'Firefox' or 'About Firefox'
- 4. If an update is available, tap 'Update' to download and install Firefox 107.0 or later
- 5. Restart the browser after the update completes
- 6. Alternatively, download Firefox 107.0 or later from the official Mozilla website or Google Play Store and install it
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Firefox
Scoped from the published advisory
- Consultation1.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-45413 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-45413 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data