CVE-2023-4934
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 · uneditedAuthorization Bypass Through User-Controlled Key vulnerability in Usta AYBS allows Authentication Abuse, Authentication Bypass. This issue affects AYBS: before 1.0.3.
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 confidenceUsta AYBS before version 1.0.3 contains an authorization bypass vulnerability where an attacker can manipulate a user-controlled key to bypass authentication mechanisms. This allows unauthorized access to the system by abusing the authentication flow, likely through insecure direct object reference (IDOR) or improper authorization validation on sensitive parameters.
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< 1.0.3CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 if Usta AYBS is installedLocate the Usta AYBS application in your environment - check for application files, services, or containers running this softwareAffected if Usta AYBS is present in your environment
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Determine the installed versionQuery the application for its version number using the system's package manager, application UI, or configuration filesAffected if The version is less than 1.0.3 or cannot be determined
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Identify authentication-related endpointsReview application routing or API definitions to locate authentication-related endpoints and parametersAffected if The application exposes authentication endpoints that accept user-controlled parameters
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Verify if user-controlled keys affect authenticationExamine authentication logic for parameters that can be manipulated to influence authentication decisions without proper validationAffected if User-controllable parameters are used in authentication decisions without server-side validation
Your environment is affected if Usta AYBS version is below 1.0.3 and the application uses user-controlled parameters in authentication logic without proper server-side validation.
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.
dbcve · scoped1.0.3
Upgrade to AYBS version 1.0.3 or later. Additionally, implement proper server-side authorization checks and validate all user-controlled parameters used in authentication decisions.
1.0.3
- Contact the vendor (Usta AYBS) to obtain version 1.0.3 or later
- Follow the vendor's official upgrade procedure to update AYBS to version 1.0.3
- Verify the upgrade was successful and test that the authorization bypass is remediated
- Ensure the system is running the fixed version after upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-4934 — 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-2023-4934 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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