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CVE-2026-54670 – Unauthenticated Access & Path Traversal (RCE risk) – WeGIA ≤ 3.8.4

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Summary

CVE-2026-54670 is a critical vulnerability in WeGIA, an open-source web management platform used by charitable institutions, that allows unauthenticated attackers to bypass authorization checks and perform path traversal / local file inclusion through the contribution management controller. The flaw combines a missing-authentication check (CWE-306) with insufficient input validation on controller/method names (CWE-22), letting remote attackers access sensitive financial and donor data or include arbitrary files without any credentials. It carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: The request dispatcher in /html/contribuicao/controller/control.php explicitly exempts the ContribuicaoLogController from the application’s authentication check, so any request targeting that controller executes without a valid session.
  • Input validation gap: Unlike the main control.php, which enforces a whitelist of over 50 valid controller/method combinations, the contribution dispatcher only sanitizes attacker-supplied nomeClasse (controller) and metodo (method) parameters with htmlspecialchars(), rather than restricting them to an allowlist.
  • Path traversal: Because the controller name is used to build a file inclusion path without canonicalization or restriction, attackers can supply traversal sequences to include files outside the intended directory.
  • Attack vector: Network-based, no authentication or user interaction required (AV:N/AC:L/PR:N/UI:N).
  • Impact: Unauthenticated attackers can invoke sensitive methods (e.g., getContribuicoesLogJSON, sincronizarStatus) to disclose donation/contribution records containing PII and financial data, trigger payment-gateway synchronization or fraudulent billing operations, and potentially read files containing database credentials or source code via the path traversal flaw. NVD/CVSS scoring reflects high confidentiality and integrity impact with no availability impact (C:H/I:H/A:N).

Affected software

  • WeGIA (WeGIA – Web manager for charitable institutions), by LabRedesCefetRJ
  • All versions up to and including 3.8.4

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade WeGIA to version 3.8.5 or later, which fixes the authentication bypass and adds proper controller/method validation for the contribution module.
  • If immediate patching is not possible:
    • Restrict network access to the WeGIA instance (e.g., place it behind a VPN or IP allowlist) to limit exposure to trusted users only.
    • Use a web application firewall (WAF) to block requests to the contribution controller endpoint (control.php under /html/contribuicao/) that contain unexpected nomeClasse/metodo values or path traversal sequences (e.g., ../).
    • Monitor logs for unauthenticated requests to contribution-related endpoints and for anomalous file-inclusion patterns.
    • Rotate any credentials that may be stored in configuration files potentially exposed via path traversal.

References

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