CVE-2025-40805
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 · uneditedAffected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an unauthenticated remote attacker to circumvent authentication and impersonate a legitimate user. Successful exploitation requires that the attacker has learned the identity of a legitimate user.
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 authentication bypass vulnerability where specific API endpoints on affected devices fail to properly enforce user authentication. An unauthenticated remote attacker can exploit these unprotected endpoints to circumvent the normal authentication flow and impersonate a legitimate user, provided the attacker has first learned the identity of that target user.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.
-
Identify the product and versionLocate the installed application or device firmware version through its web interface, command line interface, or system information. Common locations include: admin panels, 'about' pages, CLI commands like 'show version', or configuration files.Affected if The identified version falls within any affected version range provided by the vendor for this CVE.
-
Map accessible API endpointsReview application documentation, examine web server configuration files, or use network scanning tools to identify exposed API endpoints. Check common paths such as /api/, /rest/, /v1/, /v2/, or custom endpoint directories.Affected if API endpoints exist that are reachable over the network without prior authentication.
-
Test API endpoint authentication enforcementSend HTTP requests to identified API endpoints without including authentication credentials (such as cookies, tokens, headers, or API keys). Use tools like curl or browser developer tools to observe the response.Affected if The API endpoints return successful responses or valid data without requiring authentication credentials.
-
Verify user identity handlingExamine API responses when providing only a user identifier (such as username, email, or user ID) in request parameters or headers without valid authentication tokens. Compare responses to authenticated requests.Affected if The system accepts user identifiers without valid authentication and returns user-specific data or performs actions as that user.
-
Check authentication configurationReview authentication configuration files, middleware settings, or API gateway rules to determine which endpoints are explicitly marked as requiring authentication versus those that bypass authentication checks.Affected if Specific API endpoints are configured to skip or fail to enforce authentication validation.
You are affected if your device or application exposes API endpoints that allow unauthenticated access and permit user impersonation through known user identities.
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 dataImmediate remediation requires identifying and securing the vulnerable API endpoints with proper authentication enforcement, followed by deploying patches from the device vendor and validating that authentication is correctly required across all sensitive endpoints.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 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 $7,680.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-40805 — 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-2025-40805 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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