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FUXA's Unauthenticated Project Data Disclosure Exposes Server-Side Scripts and Device Configurations

High severity GitHub Reviewed Published May 26, 2026 in frangoteam/FUXA • Updated May 27, 2026

Package

npm fuxa-server (npm)

Affected versions

= 1.3.0

Patched versions

1.3.1

Description

Summary

The GET /api/project endpoint exposes sensitive project configuration data to guest-context requests even when secureEnabled is enabled.

Details

File: server/api/projects/index.js

prjApp.get("/api/project", secureFnc, function(req, res) {
    const permission = checkGroupsFnc(req);
    runtime.project.getProject(req.userId, permission).then(result => {
        if (result) {
            res.json(result);
        }
    });
});

The endpoint uses the secureFnc middleware, but this middleware calls verifyToken in server/api/jwt-helper.js which auto-generates a valid guest JWT when no token is provided (line 49-51):

if (!token) {
    token = getGuestToken();
}

The guest token is signed with the server's secret and passes verification. The handler then calls getProject which returns the full project data. The _filterProjectPermission function (line 924 of server/runtime/project/index.js) filters some UI elements for non-admin users, but it does not remove scripts, devices, alarms, or other sensitive configuration data.

PoC

Environment

  • FUXA v1.3.0-2773 (frangoteam/fuxa:latest)
  • secureEnabled: true with a random secretCode

Retrieve full project data without authentication:

curl -s http://192.168.32.129:1881/api/project
{
  "scripts": [
    {
      "id": "SCRIPT_ID",
      "name": "calculate"
    },
  ]
}

No authentication token, API key, or cookie was provided. The response includes:

  • Server-side scripts: full source code, IDs, names, execution mode, and permission levels. This reveals internal automation logic and sensitive project structure information that could assist further attacks against the deployed system.
  • Device configurations: and communication endpoint information may also be exposed depending on the deployed project configuration.
  • HMI views: the full SVG content and layout of every operator screen, including variable bindings that map UI elements to device tags.
  • Alarm definitions: alarm thresholds, conditions, and notification settings when configured.

Impact

The endpoint may expose sensitive project configuration data including script metadata, device connection information, HMI configuration, and alarm definitions. In industrial environments this information can assist further targeted attacks against the deployed system.

References

@unocelli unocelli published to frangoteam/FUXA May 26, 2026
Published to the GitHub Advisory Database May 27, 2026
Reviewed May 27, 2026
Last updated May 27, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

Weaknesses

Insertion of Sensitive Information Into Sent Data

The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. Learn more on MITRE.

CVE ID

CVE-2026-47717

GHSA ID

GHSA-q3w6-q3hc-c5x6

Source code

Credits

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