FirefoxWeb browser · Mozilla
CVE-2024-10462
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 · uneditedTruncation of a long URL could have allowed origin spoofing in a permission prompt. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.
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 confidenceA URL truncation vulnerability in Firefox and Thunderbird permission prompts could allow attackers to spoof the origin of a website, potentially tricking users into granting sensitive permissions to malicious sites. The long URL gets truncated in the prompt, masking the true origin.
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
< 128.4.0< 132.0< 128.4.0>= 129.0, < 132.0CVSS 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
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 installed Firefox versionIn Firefox, go to Help > About Firefox (or navigate to about:support). The version number is displayed on the page that opens.Affected if The version is below 132.0 (vulnerable: any version < 132.0, including 128.3.x and earlier)
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Identify installed Thunderbird versionIn Thunderbird, go to Help > About Thunderbird. The version number is displayed in the dialog that appears.Affected if The version is below 128.4.0 OR between 129.0 and 131.x (inclusive)
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Confirm version format matches advisory rangesCompare your exact version number (e.g., 128.3.1, 131.0.2, 132.0) against the affected ranges: Firefox < 132.0, Thunderbird < 128.4.0 OR >= 129.0 and < 132.0Affected if Your version falls within any of the listed vulnerable ranges
You are affected if you are running any Firefox version below 132.0 or any Thunderbird version below 128.4.0 or between 129.0 and 131.x.
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 · scoped128.4.0132.0
Update affected Mozilla products to version 132 (Firefox), 128.4 (Firefox ESR/Thunderbird), or later to patch the origin spoofing vulnerability in permission prompts.
Firefox 132.0 or later; Firefox ESR 128.4.0 or later; Thunderbird 128.4.0 or later; Thunderbird 132.0 or later
- 1. Open Firefox or Thunderbird
- 2. Navigate to the Help menu
- 3. Select 'About Firefox' or 'About Thunderbird'
- 4. The application will check for updates and prompt to download version 132.0 (or latest)
- 5. Restart the browser/application after the update completes
- 6. Alternatively, download the latest version from the official Mozilla website: https://www.mozilla.org/firefox/download/ or https://www.mozilla.org/thunderbird/download/
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Firefox
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 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 $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-10462 — 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-2024-10462 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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- 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
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