dbcve.org
SafariWeb browser · Apple

CVE-2025-24180

HIGH · 8.1 CVSS v3.1 Published 2025-03-31
Fix available
A fix is available. Upgrade to 2.3 / 15.4 or later.
See remediation →
88/100
Remediation priority · High
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
The issue was addressed with improved input validation. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, visionOS 2.4, watchOS 11.4. A malicious website may be able to claim WebAuthn credentials from another website that shares a registrable suffix.

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

This is a WebAuthn authentication bypass vulnerability where a malicious website can steal (claim) WebAuthn credentials from another website that shares the same registrable suffix (eTLD+1). The fix in Safari 18.4 and other Apple OS updates implements improved input validation to properly enforce origin separation between sites.

MitigationEnsure all user devices are updated to the fixed versions (Safari 18.4, iOS 18.4, macOS Sequoia 15.4, visionOS 2.4, watchOS 11.4) to remediate this cross-site credential theft vulnerability.

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
SafariWeb browser
Affected:< 18.4
IpadosOperating system
Affected:< 18.4
Iphone OsOperating system
Affected:< 18.4
macOSOperating system
Affected:>= 15.0, < 15.4
VisionosOperating system
Affected:< 2.3

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
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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. Check Safari version on macOS
    Open Safari, go to Safari > About Safari to view the version number
    Affected if Version is less than 18.4 and you use WebAuthn for authentication on any website
  2. Check macOS version
    Click Apple menu > About This Mac to see the macOS version
    Affected if macOS version is 15.0, 15.1, 15.2, or 15.3 (shown as 15.x) and you use WebAuthn for authentication on any website
  3. Check iOS or iPadOS version
    Go to Settings > General > About on iPhone or iPad to view the iOS version
    Affected if Version is less than 18.4 and you use WebAuthn for authentication on any website
  4. Check visionOS version
    Go to Settings > General > About on Apple Vision to view the version
    Affected if Version is less than 2.3 and you use WebAuthn for authentication on any website
  5. Verify WebAuthn credential usage
    Check your browser's credential manager or review your relying party applications for WebAuthn/WebCrypto credential registrations
    Affected if You have WebAuthn credentials registered on websites - the vulnerability allows theft of these credentials by malicious sites sharing the same eTLD+1 (e.g., attacker on evil.example.com stealing credentials from legit.example.com)

You are affected if any Apple device/browser you use runs Safari < 18.4, iOS/iPadOS < 18.4, macOS 15.0-15.3, or visionOS < 2.3 AND you authenticate using WebAuthn on websites that share an eTLD+1 with other sites you visit.

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 2.3 / 15.4 / 18.4 or later
Fixed in 2.315.418.4
Interim mitigation

Ensure all user devices are updated to the fixed versions (Safari 18.4, iOS 18.4, macOS Sequoia 15.4, visionOS 2.4, watchOS 11.4) to remediate this cross-site credential theft vulnerability.

Recommended fix High confidence

Safari 18.4, iOS 18.4, iPadOS 18.4, macOS Sequoia 15.4, visionOS 2.4, watchOS 11.4

  1. For Safari on macOS: Open the App Store, click Updates, and install Safari 18.4
  2. For iPhone: Go to Settings > General > Software Update and install iOS 18.4
  3. For iPad: Go to Settings > General > Software Update and install iPadOS 18.4
  4. For Mac: Go to System Settings > General > Software Update and install macOS Sequoia 15.4
  5. For Apple Vision: Go to Settings > General > Software Update and install visionOS 2.4
  6. For Apple Watch: Go to Settings > General > Software Update on the paired iPhone, or on Watch go to Settings > General > Software Update, and install watchOS 11.4
Caveat Standard OS upgrade considerations apply; ensure backup before updating and verify app compatibility

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

Fix this in Safari Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

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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-2025-24180 in production — separate from our analysis above.

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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