CVE-2026-54767 in WeGIA
Summary
by MITRE • 09/18/2026
WeGIA is a web manager for charitable institutions. Prior to 3.8.5, web/html/socio/sistema/controller/deletar_socios.php exposes an unauthenticated GET endpoint whose chave parameter is checked only against a hardcoded chave_correta value embedded in the public source repository. A remote attacker who obtains that value can reach the endpoint's TRUNCATE TABLE operations for the endereco, pessoafisica, pessoajuridica, and socio tables without an administrative session or application authorization, permanently destroying member and contributor records. The attack requires the affected tables to exist and the web process database account to possess truncation privileges. This issue is fixed in version 3.8.5.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in WeGIA versions prior to 3.8.5 represents a critical failure in access control mechanisms, specifically classified under CWE-284 Improper Access Control and CWE-611 Improper Restriction of XML External Entity Reference if interpreted broadly as improper restriction of functionality, though more accurately it falls under CWE-798 Use of Hard-coded Credentials for the static key check. WeGIA is a web-based management system designed for charitable institutions to handle member and contributor data. The core technical flaw resides in the file located at web/html/socio/sistema/controller/deletar_socios.php, which exposes an unauthenticated GET endpoint. This endpoint allows for the deletion of records within the application's database without requiring any form of user authentication or session validation.
The operational mechanism of this vulnerability relies on a hardcoded static value named chave_correta embedded directly in the public source repository. The server-side logic checks the incoming chave parameter against this hard-coded string rather than validating it through a secure, dynamic token generation system or verifying an active administrative session. Because the correct key is publicly available to any attacker who can access the application's source code, they can trivially construct valid requests to trigger destructive database operations. This design flaw effectively bypasses all intended authentication and authorization layers, allowing unauthenticated actors to perform actions reserved exclusively for privileged administrators.
The impact of this vulnerability is severe and irreversible due to the specific SQL commands executed by the endpoint. Upon receiving a request with the correct chave parameter, the application executes TRUNCATE TABLE operations on four critical database tables: endereco, pessoafisica, pessoajuridica, and socio. The use of TRUNCATE rather than DELETE is particularly damaging because it rapidly removes all rows from these tables without logging individual row deletions in many database configurations, making recovery difficult or impossible depending on the backup strategy. This results in the permanent destruction of member profiles, personal data for individuals (pessoafisica), legal entity information (pessoajuridica), and general membership records (socio). Such an event constitutes a catastrophic loss of integrity and availability, potentially violating data protection regulations such as GDPR or LGPD due to the complete erasure of personally identifiable information.
From a threat modeling perspective, this vulnerability aligns with MITRE ATT&CK technique T1485 Data Destruction, where adversaries aim to disrupt operations by destroying data. It also reflects aspects of T1078 Valid Accounts if one considers that obtaining the key is equivalent to gaining valid administrative credentials through improper credential management practices. The attack requires minimal prerequisites: the attacker must have network access to the web server and be able to retrieve the source code or binary artifacts containing the hardcoded chave_correta value. Additionally, the database user account running the web application must possess TRUNCATE privileges on these tables, which is a common but risky configuration practice that exacerbates the impact of this flaw.
Mitigation strategies focus primarily on immediate patching and long-term architectural improvements. The most urgent action is to upgrade WeGIA to version 3.8.5 or later, where this vulnerability has been resolved by implementing proper authentication checks for administrative endpoints. In addition to upgrading, organizations should review their database user permissions to ensure that the web application account does not have excessive privileges such as TRUNCATE rights on production databases; using DELETE with appropriate WHERE clauses is generally safer than TRUNCATE if bulk deletion features are required. Furthermore, developers must avoid hardcoding sensitive values like authentication keys in source code repositories. Instead, these should be managed through secure configuration files outside the web root or via environment variables that are not exposed to version control systems. Regular security audits and static application security testing (SAST) can help identify such hardcoded credentials before deployment.