CVE-2020-9775
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 existed in the handling of tabs displaying picture in picture video. The issue was corrected with improved state handling. This issue is fixed in iOS 13.4 and iPadOS 13.4. A user's private browsing activity may be unexpectedly saved in Screen Time.
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 vulnerability in iOS 13.4 and iPadOS 13.4 involves improper state handling when Safari tabs display Picture-in-Picture video during private browsing sessions. The bug causes private browsing activity to be unexpectedly recorded in Screen Time, potentially exposing a user's private browsing history through parental control logs.
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< 13.4< 13.4>= 10.15, < 10.15.4CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 your device typeDetermine if the device is an iPhone, iPad, or Mac computerAffected if Device is an iPhone, iPad, or Mac running the affected OS versions
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Check the installed iOS or iPadOS versionGo to Settings > General > About on iPhone/iPad and note the Version numberAffected if Version is lower than 13.4 (for example, 13.3.1, 13.3, etc.)
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Check the installed macOS versionClick the Apple menu > About This Mac and note the version number under macOSAffected if macOS version is 10.15, 10.15.1, 10.15.2, or 10.15.3 (anything from 10.15 up to but not including 10.15.4)
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Verify Screen Time or parental controls are enabledOn iOS/iPadOS: go to Settings > Screen Time; on macOS: go to System Preferences > Screen TimeAffected if Screen Time is turned on and any parental control or activity reporting features are active
The device is affected if it runs iOS/iPadOS below 13.4 or macOS between 10.15 and 10.15.3, and the user utilizes Safari's Picture-in-Picture feature while in Private Browsing mode with Screen Time enabled.
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 data10.15.413.4
Upgrade to iOS 13.4/iPadOS 13.4 or later to obtain the corrected state handling for Picture-in-Picture video tabs that prevents private browsing data from being saved to Screen Time.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9775 — 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-2020-9775 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