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Improper Input ValidationWeakness · CWE-20

CVE-2023-7240

MEDIUM · 5.8 CVSS v3.1 Published 2024-05-07
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
67/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
 An improper authorization level has been detected in the login panel. It may lead to unauthenticated Server Side Request Forgery and allows to perform open services enumeration. Server makes query to provided server (Server IP/DNS field) and is triggering connection to arbitrary address.

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 confidence

The login panel contains an improper authorization vulnerability that allows unauthenticated attackers to supply arbitrary IP addresses or DNS names that the server will connect to, enabling Server-Side Request Forgery (SSRF). This can be exploited for open services enumeration and potentially pivoting to internal network targets.

MitigationImplement proper authorization checks on the login panel to verify user permissions before allowing server-side requests, and validate/sanitize all user-supplied IP and DNS inputs to prevent connections to arbitrary addresses.

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
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify login panel input fields that accept IP or DNS values
    Review the application's login panel HTML source and form parameters for fields that accept network addresses, hostnames, or URLs (such as 'server', 'host', 'url', 'redirect', or similar parameters)
    Affected if The login panel contains input fields that accept arbitrary IP addresses or DNS names without clear business justification
  2. Determine if login panel is accessible to unauthenticated users
    Attempt to access the login panel without providing credentials or session cookies; verify HTTP response status and whether the panel renders
    Affected if The login panel is fully accessible without authentication, allowing any user to reach the vulnerable interface
  3. Check for server-side request functionality in login panel
    Review application logs, network traffic, or backend code to determine if the login panel triggers outbound connections based on user-supplied input (such as callback URLs, webhook endpoints, or proxy settings)
    Affected if The login panel causes the server to make outbound HTTP or network connections to addresses provided by the user
  4. Verify absence of authorization checks before request execution
    Test by supplying arbitrary IP addresses (such as 127.0.0.1, internal network ranges like 10.0.0.1) or DNS names in login panel fields and observe if the server attempts to connect to those addresses without returning an authorization error first
    Affected if The server processes the request and attempts to connect to arbitrary addresses without verifying user permissions first
  5. Confirm the request originates from the server (SSRF)
    Use a controlled endpoint (such as a unique webhook URL or logs) to capture incoming connections and verify the request source IP is the server itself rather than the client
    Affected if The application makes outbound connections from server-side infrastructure to the attacker-supplied address, confirming SSRF rather than client-side request

Your environment is affected if the login panel allows unauthenticated users to supply arbitrary IP addresses or DNS names that the server will connect to without proper authorization checks.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement proper authorization checks on the login panel to verify user permissions before allowing server-side requests, and validate/sanitize all user-supplied IP and DNS inputs to prevent connections to arbitrary addresses.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-7240 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
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  • Version or environment caveats, and links to real fixes
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