CVE-2025-57754: Critical Exposure of Sensitive Supabase URI in eslint-ban-moment Plugin

Overview

The CVE-2025-57754 vulnerability is a critical issue that affects the eslint-ban-moment plugin, a tool used in the final assignment of the VIHU course. The vulnerability arises from an exposed sensitive Supabase URI within the .env environment configuration file. The impact of this vulnerability is significant as it could potentially allow an attacker unauthorized access to the database and user data. This unauthorized access could lead to data exfiltration, modification, or even deletion.

Vulnerability Summary

CVE ID: CVE-2025-57754
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized access and control over database and user data leading to potential data exfiltration, modification or deletion.

Affected Products

Product | Affected Versions

eslint-ban-moment | 3.0.0 and earlier

How the Exploit Works

The vulnerability stems from an insecure exposure of the Supabase URI within the .env file of the eslint-ban-moment plugin. This URI contains embedded username and password information, providing anyone who gains access to it complete control over the connected database and user data.
An attacker could exploit this vulnerability by accessing the exposed .env file, retrieving the Supabase URI, and using it to gain unauthorized access to the database. This could lead to a variety of potential malicious activities, including data exfiltration, modification, or deletion.

Conceptual Example Code

While the exact exploit would depend on the specific circumstances and the attacker’s goals, a conceptual example might look something like this:

# Attacker retrieves the .env file
$ wget http://target.example.com/.env
# The .env file contains the exposed Supabase URI
SUPABASE_URL="https://app.supabase.io/projectid/settings/api/databaseUrl"
# Attacker uses the retrieved Supabase URI to gain unauthorized access to the database
$ curl ${SUPABASE_URL}

This example assumes that the attacker has network access to the target system and that the .env file is accessible. In reality, additional steps and more sophisticated techniques might be required to exploit this vulnerability.

Mitigation

The recommended mitigation strategy for this vulnerability is to apply the vendor-supplied patch. However, if a patch is not immediately available, a temporary mitigation could be to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and block malicious attempts to access the .env file. Furthermore, it is suggested to always review and secure the exposure of sensitive information within environment configuration files.