CVE-2021-32956
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 · uneditedAdvantech WebAccess/SCADA Versions 9.0.1 and prior is vulnerable to redirection, which may allow an attacker to send a maliciously crafted URL that could result in redirecting a user to a malicious webpage.
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 confidenceAdvantech WebAccess/SCADA versions 9.0.1 and prior contains an open redirect vulnerability (CWE-601) where the application does not properly validate redirect URLs, allowing attackers to craft malicious URLs that redirect users to attacker-controlled websites for phishing or malware delivery purposes.
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<= 9.0.1CVSS 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
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/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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Identify installed WebAccess/SCADA versionCheck the product version through the Windows installed programs list (Programs and Features), or look for version info in the WebAccess installation directory, typically found in the about or help sections of the web interfaceAffected if The installed version is 9.0.1 or lower
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Verify web interface is accessibleConfirm the Advantech WebAccess/SCADA web interface is reachable by accessing the server URL (typically port 80/443 or configured port) in a browserAffected if The web interface is exposed and accessible
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Locate redirect-capable parametersInspect URL parameters in common WebAccess pages, looking for parameters that control navigation or redirection (such as 'redirect', 'url', 'returnUrl', 'next', 'target', or similar query string parameters)Affected if The application uses redirect parameters in any part of the web interface
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Test redirect validationCraft a test URL with an external domain in a suspected redirect parameter (for example: ?redirect=http://example.com) and observe whether the application allows the external redirect without validation or warningAffected if The application redirects to the arbitrary URL without proper validation or warning prompt
You are affected if Advantech WebAccess/SCADA version 9.0.1 or prior is installed and the web interface with redirect functionality is accessible.
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 dataImplement strict allowlist-based URL validation for all redirect parameters, ensuring only trusted domains or paths are permitted. Additionally, display a warning page before following external redirects.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-32956 — 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-2021-32956 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
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