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Incorrect AuthorizationWeakness · CWE-863

CVE-2024-40530

HIGH · 7.5 CVSS v3.1 Published 2024-08-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
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
A vulnerability in Pantera CRM versions 401.152 and 402.072 allows unauthorized attackers to bypass IP-based access controls by manipulating the X-Forwarded-For header.

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 confidence

The vulnerability allows attackers to bypass IP-based access controls by manipulating the X-Forwarded-For HTTP header. This occurs because the application trusts client-supplied X-Forwarded-For values without proper validation, enabling IP spoofing attacks against IP whitelist or geographic restrictions.

MitigationImplement proper validation of proxy headers: either disable use of X-Forwarded-For for access control entirely and use connection-level IP information, or implement strict validation to only trust X-Forwarded-For from known/authorized proxy infrastructure.

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
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 if X-Forwarded-For is used for access control
    Review application code, access control rules, or WAF configuration to determine whether IP-based restrictions (whitelists, geo-blocking, rate limiting) rely on the X-Forwarded-For header rather than the connection's actual remote IP address.
    Affected if Access control rules reference X-Forwarded-For header values for IP-based decisions.
  2. Check proxy header trust configuration
    Inspect application or proxy configuration files (e.g., reverse proxy configs, load balancer settings, web server settings) for directives that instruct the application to trust and parse client-supplied X-Forwarded-For headers without validation.
    Affected if The application is configured to directly use X-Forwarded-For values from incoming requests without filtering trusted proxies.
  3. Verify source IP validation logic
    Examine access control code or security modules to confirm whether the application validates that X-Forwarded-For originates only from known, authorized proxy infrastructure (e.g., by checking IP allowlists for proxies).
    Affected if No validation exists to ensure X-Forwarded-For was set by an authorized proxy rather than supplied by the client.
  4. Confirm if application trusts first vs. last X-Forwarded-For value
    Determine whether the application uses the leftmost (first) X-Forwarded-For value (which could be spoofed) or the rightmost (last) value (set by the trusted proxy) when multiple proxy hops exist.
    Affected if The application uses the leftmost/first X-Forwarded-For value for access control decisions.
  5. Review reverse proxy configuration
    Inspect reverse proxy or CDN configuration to see if X-Forwarded-For is being passed through unmodified or if the application is deployed directly without a trusted proxy in front.
    Affected if The application is exposed directly to clients without a trusted reverse proxy that overwrites X-Forwarded-For, or the proxy is misconfigured to pass client-supplied values through.

A user is affected if their application uses X-Forwarded-For header values for IP-based access control without validating that those values came from a trusted proxy infrastructure.

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 validation of proxy headers: either disable use of X-Forwarded-For for access control entirely and use connection-level IP information, or implement strict validation to only trust X-Forwarded-For from known/authorized proxy infrastructure.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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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-2024-40530 in production — separate from our analysis above.

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What this is

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