CVE-2021-27453
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 · uneditedMesa Labs AmegaView Versions 3.0 uses default cookies that could be set to bypass authentication to the web application, which may allow an attacker to gain access.
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 confidenceMesa Labs AmegaView version 3.0 uses default, hardcoded cookies that can be set by an attacker to bypass authentication mechanisms in the web application. By manipulating these preset cookie values, an unauthenticated attacker can gain unauthorized access to the application without providing valid credentials.
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<= 3.0CVSS 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
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 AmegaView versionAccess the web application admin interface or check the product documentation/dashboard to determine the installed version number of AmegaViewAffected if The installed version is 3.0 or lower (<= 3.0)
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Inspect browser cookiesUsing browser developer tools, navigate to the Application or Storage tab and examine all cookies set by the AmegaView application. Record the cookie names and their assigned valuesAffected if Any cookie contains a static, non-unique value that persists across sessions or appears to be a default preset value rather than a dynamically generated session token
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Test authentication bypassClear all session data, then manually set a suspected default cookie value and attempt to access protected pages or administrative functions without providing valid credentialsAffected if Setting a default cookie value grants access to protected resources without valid authentication
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Compare cookie generationLog out and log back in while monitoring cookie creation. Compare cookie values between different sessions to determine if they are dynamically generated or staticAffected if Cookie values remain identical across different user sessions or do not change after re-authentication
A user is affected if running AmegaView version 3.0 or lower and the application uses static default cookies that can be manipulated to bypass authentication.
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 dataReplace default cookie values with dynamically generated, cryptographically secure session tokens; implement proper authentication and session management; conduct a full audit for other hardcoded credentials.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 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 $7,328.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27453 — 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-2021-27453 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