SafariWeb browser · Apple
CVE-2020-9915
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 access issue existed in Content Security Policy. This issue was addressed with improved access restrictions. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8, watchOS 6.2.8, Safari 13.1.2, iTunes 12.10.8 for Windows, iCloud for Windows 11.3, iCloud for Windows 7.20. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
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 a Content Security Policy (CSP) bypass vulnerability in Safari and other Apple web-based components. Maliciously crafted web content can prevent CSP from being properly enforced, potentially allowing attackers to inject malicious scripts or execute other attacks that CSP would normally block.
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
< 13.1.2< 7.20>= 11.0, < 11.3< 12.10.8< 13.6< 13.6< 13.4.8< 6.2.8CVSS 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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Check Safari version on macOSOpen Safari, go to Safari menu > About Safari. The version number is displayed next to 'Safari'.Affected if The version is less than 13.1.2
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Check iOS or iPadOS version on iPhone or iPadOpen Settings app, tap General > About. The version number is shown next to 'Version'.Affected if The version is less than 13.6 (for either iOS or iPadOS)
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Check tvOS version on Apple TVOpen Settings app on Apple TV, go to General > About. The version number appears next to 'Version'.Affected if The version is less than 13.4.8
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Check watchOS version on Apple WatchOpen Watch app on paired iPhone, go to General > About. The version is shown next to 'watchOS'.Affected if The version is less than 6.2.8
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Check iTunes version on WindowsOpen iTunes, go to Help > About iTunes. The version number is displayed in the dialog.Affected if The version is less than 12.10.8
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Check iCloud for Windows versionOpen iCloud app, click the gear icon or go to Help > About iCloud. The version number is displayed.Affected if The version is less than 7.20 OR the version is 11.0 or higher but less than 11.3
Any Apple product (Safari, iOS, iPadOS, tvOS, watchOS, iTunes, or iCloud for Windows) installed at a version below its respective fixed version is affected by this CSP bypass vulnerability.
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 data6.2.87.2011.3
Update affected Apple products to the fixed versions: iOS 13.6+/iPadOS 13.6+, tvOS 13.4.8+, watchOS 6.2.8+, Safari 13.1.2+, iTunes 12.10.8 for Windows, or iCloud for Windows 11.3/7.20+. No code-level remediation is required as this is a vendor-patched vulnerability.
Fix this in Safari
Scoped from the published advisory
- Consultation1.0 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 $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9915 — 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-2020-9915 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
- No spam, self-promotion, credentials, or personal data