dbcve.org
Firefox FocusWeb browser · Mozilla

CVE-2025-10290

MEDIUM · 6.5 CVSS v3.1 Published 2025-09-16
Fix available
A fix is available. Upgrade to 143.0 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges

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 · unedited
Opening links via the contextual menu in Focus iOS for certain URL schemes would fail to load but would not refresh the toolbar correctly, allowing attackers to spoof websites if users were coerced into opening a link explicitly through a long-press. This vulnerability was fixed in Focus for iOS 143.0.

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 confidence

In Focus iOS, opening links via the contextual menu (long-press) for certain URL schemes would fail to load but the toolbar would not refresh correctly, allowing attackers to spoof websites by tricking users into long-pressing a malicious link.

MitigationUpdate to Focus for iOS version 143.0 or later, which corrects the toolbar refresh behavior when URL scheme links fail to load.

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
Firefox FocusWeb browser
Affected:< 143.0

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Firefox Focus for iOS is installed
    Navigate to Settings > General > iPhone Storage (or Settings > Apps on iOS 15+) and locate Firefox Focus in the app list. Alternatively, search for 'Focus' in the device app library.
    Affected if The app is not present on the device, meaning the user is not affected by this vulnerability.
  2. Identify the installed version of Firefox Focus
    Open the App Store app, tap your profile icon at the top right, scroll to 'Purchased' > 'My Apps', find Firefox Focus, and view the version number. Alternatively, check the app version in the App Store listing if already downloaded.
    Affected if Unable to determine the installed version prevents accurate vulnerability assessment.
  3. Compare the installed version to the affected range
    Review the version number identified in step 2. The affected range is any version prior to 143.0 (for example: 142.5, 142.0, 141.x, etc.). Compare numerically ensuring earlier major.minor combinations are identified.
    Affected if The installed version is a number less than 143.0, indicating the device is running a vulnerable version.
  4. Verify if the contextual menu feature is used
    Consider whether the browser's contextual menu (long-press on a link to bring up options) is regularly used for opening links with non-standard URL schemes.
    Affected if The vulnerability only triggers when using the long-press contextual menu on links with certain URL schemes that fail to load, so infrequent or non-use of this feature reduces exposure risk.

A user is affected if Firefox Focus for iOS is installed with a version number lower than 143.0 and they use the long-press contextual menu to open links with URL schemes that fail to load.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 143.0 or later
Fixed in 143.0
Interim mitigation

Update to Focus for iOS version 143.0 or later, which corrects the toolbar refresh behavior when URL scheme links fail to load.

Recommended fix High confidence

Firefox Focus iOS 143.0

  1. Open the App Store on your iOS device
  2. Search for Firefox Focus or locate it in your installed apps
  3. Tap Update to install version 143.0 or later
  4. Alternatively, go to Settings > Firefox Focus > Check for Updates
  5. After updating, verify the version number shows 143.0 or higher in the app settings

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Firefox Focus Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-10290 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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