CVE-2021-45026
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 · uneditedASG technologies ASG-Zena Cross Platform Server Enterprise Edition 4.2.1 is vulnerable to Cross Site Scripting (XSS).
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 confidenceASG-Zena Cross Platform Server Enterprise Edition 4.2.1 contains a Cross Site Scripting (XSS) vulnerability. The specific attack vector and location within the application are not detailed in the available information. The medium severity (CVSS 6.1) suggests the exploit requires some user interaction or specific context but does not result in complete system compromise.
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= 4.2.1CVSS 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 ASG-Zena versionLocate and inspect the version information for your ASG-Zena installation. This is typically visible in the product about page, server status interface, or startup logs. Consult your product documentation for the specific command or interface to retrieve version details.Affected if The installed version is exactly 4.2.1 (the only affected version per available data)
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Confirm web interface is enabledVerify whether the ASG-Zena web interface or any HTTP/HTTPS service is running and accessible. Check the server configuration or running services for web port bindings.Affected if The web interface is exposed and accessible, as XSS requires a browser-accessible endpoint to execute
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Review web input handling componentsIdentify any user-facing web forms, search fields, URL parameters, or data display areas within the ASG-Zena application. These are potential injection points for XSS.Affected if The application accepts user-supplied input that gets reflected in web pages without sanitization
You are affected only if your installed version is exactly 4.2.1 AND the web interface is accessible with user input fields that could trigger the XSS 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 dataImplement input validation and output encoding mechanisms to sanitize user-supplied data before rendering in the browser. Apply context-appropriate escaping and consider implementing Content Security Policy (CSP) headers to mitigate XSS execution.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-45026 — 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-2021-45026 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