SafariWeb browser · Apple
CVE-2018-4188
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 · uneditedAn issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. The issue involves the "WebKit" component. It allows remote attackers to spoof the address bar via a crafted web site.
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 confidenceThis is an address bar spoofing vulnerability in WebKit. Attackers can craft malicious websites that display a spoofed URL in the address bar while the user is actually visiting a different page, potentially tricking users into believing they are on a legitimate site.
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
< 11.1.1< 11.4< 11.4< 7.5< 12.7.5CVSS 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:3.0/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.
-
Check Safari version on macOSOpen Safari, then go to Safari menu > About Safari. The version number is displayed in the pop-up window.Affected if Version is below 11.1.1 (for example, 11.1, 11.0.x, or earlier)
-
Check iOS version on iPhone or iPadGo to Settings > General > About. Look for the 'Version' field which shows the iOS version number.Affected if Version is below 11.4 (for example, 11.3.x, 11.2.x, or earlier)
-
Check tvOS version on Apple TVGo to Settings > General > About. The tvOS version is displayed next to 'Version'.Affected if Version is below 11.4 (for example, 11.3.x, 11.2.x, or earlier)
-
Check iTunes version on Windows or MacOpen iTunes, then go to Help > About iTunes. The version number appears in the dialog box.Affected if Version is below 12.7.5 (for example, 12.7.4, 12.7, or earlier)
-
Check iCloud for Windows versionOpen iCloud, then click on the gear icon or go to the iCloud menu and select 'About iCloud'. The version is displayed in the window that opens.Affected if Version is below 7.5 (for example, 7.4, 7.3, or earlier)
You are affected if any Apple product listed above (Safari, iOS, tvOS, iTunes, or iCloud for Windows) is installed with a version below the specified threshold for that product.
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.
From vendor data7.511.1.111.4
Update affected Apple products to the patched versions: iOS 11.4 or later, Safari 11.1.1 or later, iCloud 7.5 or later, iTunes 12.7.5 or later, and tvOS 11.4 or later.
Fix this in Safari
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-2018-4188 — 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-2018-4188 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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