CVE-2024-38640
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 · uneditedA cross-site scripting (XSS) vulnerability has been reported to affect Download Station. If exploited, the vulnerability could allow authenticated users to inject malicious code via a network. We have already fixed the vulnerability in the following version: Download Station 5.8.6.283 ( 2024/06/21 ) and later
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 confidenceA cross-site scripting (XSS) vulnerability in Synology Download Station allows authenticated users to inject malicious JavaScript or HTML code through network-based input vectors. When other users view the injected content, the malicious code executes in their browser context, potentially enabling session hijacking, data theft, or defacement.
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>= 5.8.0, < 5.8.6.283CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 installed Download Station versionAccess the Qnap Download Station web interface and navigate to Settings > About, or check the version via the Qnap admin console under Application Management > Download Station. Note the full version number displayed.Affected if The installed version is 5.8.0 through 5.8.5.x (any version >= 5.8.0 but < 5.8.6.283)
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Verify Download Station web interface is enabledConfirm that the Download Station web interface is accessible by navigating to the application's URL (typically port 8080 or 443). Check in Qnap admin panel under Privilege > Settings > Download Station that the web access feature is turned on.Affected if The web interface is enabled and accessible, as the XSS payload executes when other users view the injected content through the browser
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Confirm multi-user access is configuredCheck if more than one user account has access to Download Station. Go to Settings > Privileges > Users in Download Station or the main Qnap admin console to list users with Download Station permissions.Affected if Multiple user accounts have Download Station access, as the vulnerability requires authenticated users to inject content that affects other users viewing that content
You are affected if Download Station version is 5.8.0 through 5.8.5.x, the web interface is enabled, and multiple users can access the application.
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 · scoped5.8.6.283
Update Download Station to version 5.8.6.283 or later. For deployments that cannot update immediately, restrict Download Station access to trusted users only and consider network-level access controls.
Download Station 5.8.6.283
- Log in to the QNAP NAS admin interface (QTS or QuTS cloud)
- Navigate to App Center
- Locate Download Station in the installed applications
- Check for available updates or reinstall Download Station to obtain version 5.8.6.283
- Verify the installed version is 5.8.6.283 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-38640 — 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-2024-38640 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