CVE-2026-81031: IDURAR ERP CRM Auth Bypass Vulnerability

CVE-2026-81031 Overview

CVE-2026-81031 is an authorization flaw in IDURAR ERP CRM that allows an authenticated administrator to change the password of any other administrator account. The password update handler resolves the authenticated user from the session token but issues its database update using an identifier taken directly from the URL path. The handler never compares the two identifiers, so any administrator can set a new password on any other administrator account and log in as that user. The issue is tracked under CWE-639: Authorization Bypass Through User-Controlled Key.

Critical Impact
Any valid administrator session can take over any other administrator account, enabling full ERP and CRM data compromise.

Affected Products

IDURAR ERP CRM through version 4.1.1
IDURAR ERP CRM v4.1.0 (confirmed vulnerable in updatePassword.js)
Deployments exposing the administrator API without additional access controls

Discovery Timeline

2026-08-26 - CVE-2026-81031 published to NVD
2026-08-26 - Last updated in NVD database

Technical Details for CVE-2026-81031

Vulnerability Analysis

The defect lives in backend/src/controllers/middlewaresControllers/createUserController/updatePassword.js. The token middleware attaches the authenticated user to the request object. The handler then builds its update filter from an identifier parsed from the URL path rather than from the authenticated principal. Because the two identifiers are never compared, a caller may target any account other than their own.

The route sits behind the administrator token check only. Any valid administrator session satisfies that check. The single ownership-like guard in the handler rejects only one hardcoded demo email address, which does not constrain real accounts. See the VulnCheck advisory for the full analysis.

Root Cause

The controller mixes two sources of identity. Authentication is derived from the session token, but authorization for the target record is derived from a client-supplied path parameter. Without a comparison between req.user and the URL identifier, the handler treats the URL value as trusted. This is a textbook Insecure Direct Object Reference pattern under [CWE-639].

Attack Vector

An attacker first authenticates with any administrator credentials, which may be low-value or newly provisioned. The read handler in the same controller directory accepts identifiers the same way and returns account records, giving the attacker the identifiers of higher-value administrator accounts. The attacker then sends an authenticated password-update request that names the target account in the URL path and supplies a new password in the request body. The server writes the new credential to the target account and the attacker signs in as that user. See the IDURAR source on GitHub for the vulnerable handler.

Detection Methods for CVE-2026-81031

Indicators of Compromise

Password update requests where the URL path identifier does not match the identifier bound to the session token.
Successful administrator logins immediately following a password update on the same account from a different session.
Repeated enumeration of the user read endpoint by a single administrator session prior to a password update call.
New administrator sessions originating from unfamiliar source addresses shortly after a password change event.

Detection Strategies

Instrument the backend to log both the authenticated user identifier and the URL path identifier on every password update request, then alert on mismatches.
Correlate updatePassword events with the account's own successful login history to flag out-of-band credential rotations.
Monitor for administrator account read operations that fan out across multiple distinct target identifiers within a short window.

Monitoring Recommendations

Forward application audit logs for the createUserController routes to a centralized analytics platform for behavioral analysis.
Track administrator authentication anomalies such as impossible travel and new-device sign-ins on privileged accounts.
Baseline normal administrator activity and alert on password changes that occur outside self-service password reset workflows.

How to Mitigate CVE-2026-81031

Immediate Actions Required

Restrict network access to the IDURAR administrator API to trusted management networks or VPN users until a patched release is deployed.
Force a password reset for every administrator account and require multi-factor authentication on the identity provider fronting the application.
Review application logs for any password update calls whose URL identifier does not match the session owner, and treat matches as suspected takeover.
Rotate API tokens, session secrets, and any service credentials stored inside the ERP or CRM after confirming the environment is clean.

Patch Information

No fixed version is listed in the NVD entry at publication. Track the IDURAR ERP CRM repository and GitHub Issue #1470 for a patched release. When a fix ships, the corrected handler must compare the authenticated user identifier from the token middleware against the identifier taken from the URL path and reject any mismatch before issuing the update.

Workarounds

Patch the local deployment to add a server-side check that rejects any updatePassword request where the URL identifier does not equal the authenticated user identifier.
Remove or disable the vulnerable route at the reverse proxy or web application firewall until a vendor fix is applied.
Limit administrator account provisioning to a small set of trusted operators to reduce the blast radius of any single compromised session.

bash

# Example NGINX block to disable the vulnerable route until patched
location ~ ^/api/admin/password/update/ {
    return 403;
}