CVE-2021-23196
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 · uneditedThe web application on Agilia Link+ version 3.0 implements authentication and session management mechanisms exclusively on the client-side and does not protect authentication attributes sufficiently.
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 confidenceAgilia Link+ version 3.0 implements authentication and session management entirely on the client-side, meaning the server does not validate credentials or session state. Authentication attributes (likely tokens, passwords, or session IDs) are stored or processed in the client without sufficient protection, allowing attackers to bypass authentication by manipulating client-side state or intercepting unprotected 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<= d25<= 3.3.0= 1.0= 1.0= 1.0< 3.0= 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 the installed product and versionLocate the installed Fresenius Kabi software (Agilia Connect Firmware, Agilia Partner Maintenance Software, Vigilant Centerium, Vigilant Insight, Vigilant Mastermed, or Link+ Agilia Firmware) and retrieve its version number from the application UI, system information panel, or firmware metadataAffected if The installed version falls within: Agilia Connect Firmware <= d25, Agilia Partner Maintenance Software <= 3.3.0, Vigilant Centerium = 1.0, Vigilant Insight = 1.0, Vigilant Mastermed = 1.0, or Link+ Agilia Firmware < 3.0 or = 3.0
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Inspect authentication mechanismExamine the application's authentication architecture and configuration files to determine whether authentication logic (credential validation, session creation) is implemented server-side or client-side. Look for references to client-side-only authentication in configuration, documentation, or code if accessibleAffected if Authentication is performed entirely client-side with no server-side validation of credentials or session state
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Check for client-stored authentication credentialsInspect the client-side storage (browser storage, local files, cookies, or application data directories) for stored authentication attributes such as tokens, passwords, session IDs, or similar credentialsAffected if Authentication tokens, passwords, session IDs, or similar credentials are stored or processed on the client without server-side validation
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Verify session validation behaviorObserve or log network traffic between the client and server during login and session usage to confirm whether the server validates session state on each request or accepts any client-provided session identifierAffected if The server accepts client-provided session identifiers without validation, allowing session bypass through client-side state manipulation
A user is affected if they are running any of the listed product versions with client-side-only authentication where the server does not validate credentials or session state.
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 data3.0
Migrate authentication to server-side validation with secure, server-managed session tokens. Implement proper session handling with HTTP-only, secure cookies and enforce all authentication logic server-side.
- Consultation8.0 h
- Implementation40.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $20,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-23196 — 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-2021-23196 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