CVE-2026-71234 in Community
Summary
by MITRE • 08/05/2026
Documize Community's attachment download route (domain/attachment/endpoint.go, Download function, registered via AddPublic with no auth middleware) accepts a `secure` query parameter and grants access whenever the parameter is simply non-empty (len(secureToken) > 0), without comparing it to any server-stored value. Any non-empty string, such as ?secure=x, bypasses authentication entirely and allows downloading any organization's attachments. Sibling handlers in the same file (togglePublish, delete) correctly enforce session-based authorization, confirming this is an inconsistency rather than intended design.
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Analysis
by VulDB Data Team • 08/05/2026
This vulnerability represents a critical authentication bypass flaw in Documize Community's attachment download functionality that directly violates fundamental security principles of access control and authentication enforcement. The issue stems from improper validation of the secure query parameter within the Download function located in domain/attachment/endpoint.go, where the system accepts any non-empty string value for the secure parameter without performing server-side verification against stored tokens or session data. This design flaw creates an arbitrary access vector that allows unauthorized users to bypass authentication mechanisms entirely, effectively granting read access to any organization's attachments within the system.
The technical implementation demonstrates a clear failure in authorization logic where the security check is reduced to a simple length comparison rather than proper token validation. When a request includes ?secure=x or any other non-empty string, the system grants unrestricted access regardless of whether the token corresponds to legitimate session data or valid user credentials. This inconsistency becomes particularly dangerous when compared to sibling handlers within the same file such as togglePublish and delete functions, which correctly enforce session-based authorization through proper middleware implementation. The juxtaposition of secure and insecure handling within the same codebase indicates either a coding error or intentional design flaw that was overlooked during security review processes.
The operational impact of this vulnerability extends far beyond simple unauthorized file access, potentially enabling data exfiltration, information disclosure, and privilege escalation attacks within the Documize Community environment. An attacker could leverage this bypass to download sensitive documents from any organization hosted on the same instance without requiring valid credentials or session tokens. This represents a significant risk for multi-tenant deployments where different organizations share the same system infrastructure, as it allows cross-tenant data access and violates the principle of least privilege that should govern all attachment handling operations. The vulnerability essentially transforms a controlled access point into an open door for any malicious actor who can construct a valid URL with a non-empty secure parameter.
Security standards such as CWE-287 (Improper Authentication) and ATT&CK techniques T1078 (Valid Accounts) and T1566 (Phishing) directly apply to this vulnerability, as it creates an authentication bypass that allows unauthorized access through seemingly legitimate means. The flaw also aligns with CWE-347 (Improper Verification of Cryptographic Signature) in the context of token validation failure, though not involving cryptographic signatures specifically. Organizations using Documize Community should immediately implement mitigations including mandatory server-side verification of secure tokens, proper session validation enforcement across all attachment handlers, and comprehensive code review processes to identify similar inconsistencies. The fix should involve comparing the provided secure parameter against stored session or authentication data rather than simply checking for non-emptiness, ensuring that only legitimate authenticated users can access protected attachments while maintaining consistency with existing authorization patterns throughout the application's attachment handling modules.