CVE-2020-9753
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 · uneditedWhale Browser Installer before 1.2.0.5 versions don't support signature verification for Flash installer.
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 · moderate confidenceThe Whale Browser Installer versions prior to 1.2.0.5 lack signature verification for Flash installers, allowing untrusted or malicious Flash installer packages to be installed without cryptographic validation of their authenticity.
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< 2.6.88.19CVSS 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
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 checksWork through these to decide whether this CVE applies to you.
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Check if Naver Whale Browser is installedLook for Whale Browser in installed programs (Windows: Control Panel > Programs and Features, or check C:\Program Files\Naver\ Whale or similar path)Affected if Whale Browser Installer is found on the system
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Identify the installed Whale Browser Installer versionIn Windows, right-click the Whale Browser installer file (usually named setup.exe or similar), select Properties, and check the Details tab for version information. Alternatively, check the installed browser version in Help > About Whale in the browser itself.Affected if The version displayed is lower than 2.6.88.19 (or 1.2.0.5 per the summary)
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Verify if Flash installer functionality is usedCheck if the Whale Browser has been used to download or install Flash Player add-ons, or check browser settings/plugins for Flash-related componentsAffected if Flash installer functionality has been used with this browser version
A user is affected if Naver Whale Browser Installer version is less than 2.6.88.19 and Flash installers have been run through the browser.
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.
dbcve · scoped2.6.88.19
Upgrade Whale Browser Installer to version 1.2.0.5 or later which implements proper signature verification for Flash installers.
Whale Browser Installer 1.2.0.5 or later
- 1. Verify current Whale Browser Installer version by checking About or version info in the installer
- 2. Download Whale Browser Installer version 1.2.0.5 or later from the official Naver Whale website or trusted distribution channel
- 3. Uninstall the existing Whale Browser Installer if present
- 4. Install the updated Whale Browser Installer version 1.2.0.5 or newer
- 5. Verify that signature verification is now supported for Flash installer components
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,592.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9753 — 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-2020-9753 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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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