CVE-2021-36723
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 · uneditedEmuse - eServices / eNvoice Exposure Of Private Personal Information due to lack of identification mechanisms and predictable IDs an attacker can scrape all the files on the service.
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 confidenceThis is an Insecure Direct Object Reference (IDOR) vulnerability in Emuse eServices/eNvoice where lack of proper identification mechanisms combined with predictable sequential IDs allows unauthenticated attackers to enumerate and scrape all files containing private personal information from the service.
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 dataall versionsCVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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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Confirm Emuse eServices/eNvoice installationIdentify the installed application by reviewing web server logs, installed software inventory, or accessing the application's login page and checking the application name and version information if displayed.Affected if The system is running Emuse eServices or Emuse eNvoice software.
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Verify unauthenticated network exposureDetermine if the application is accessible from the network without requiring authentication by attempting to access the application URL directly without credentials, or by reviewing firewall and network access control rules.Affected if The application is accessible to unauthenticated users on the network or internet.
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Test for predictable sequential IDsAccess the application and attempt to modify numeric parameters in file download or view URLs (e.g., changing /file?id=1 to /file?id=2, /file?id=3) to see if different files are accessible without authentication or authorization.Affected if Sequential numeric IDs are used and file contents are returned for different ID values without requiring authentication.
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Check file access authorizationAttempt to access multiple file URLs using incrementing IDs and verify whether the application validates user identity and ownership before returning file contents.Affected if Files are returned for sequential ID requests without verifying that the requesting user is authorized to access those specific files.
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Inspect for personal information exposureReview any accessed files to confirm they contain private personal information such as names, addresses, financial data, or other PII that should be protected.Affected if The accessed files contain private personal information that should require authorization to view.
A user is affected if their environment runs Emuse eServices/eNvoice, is network-accessible without authentication, and allows file access through predictable sequential IDs without proper authorization checks.
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 robust authentication/authorization checks for all file access requests and replace predictable sequential IDs with cryptographically random non-sequential identifiers (e.g., UUIDs) to prevent enumeration.
- Consultation4.0 h
- Implementation16.0 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 $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-36723 — 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-2021-36723 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