{"id":69789,"date":"2025-09-01T10:18:19","date_gmt":"2025-09-01T10:18:19","guid":{"rendered":""},"modified":"2025-09-14T23:36:44","modified_gmt":"2025-09-15T05:36:44","slug":"cve-2025-41702-critical-jwt-secret-key-vulnerability-in-egos-webgui","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-41702-critical-jwt-secret-key-vulnerability-in-egos-webgui\/","title":{"rendered":"CVE-2025-41702: Critical JWT Secret Key Vulnerability in egOS WebGUI<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The CVE-2025-41702 vulnerability poses a significant threat to any organization employing egOS WebGUI as a part of their technology stack. The vulnerability lies in the JWT (JSON Web Token) secret key, which is embedded and readable in the egOS WebGUI backend to the default user. This flaw can potentially allow an unauthenticated remote attacker to generate valid HS256 tokens and bypass any authentication<\/a> and authorization mechanisms in place, leading to severe security breaches. Given the potential for system<\/a> compromise or data leakage, understanding and mitigating this vulnerability is of utmost importance.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-41702
\nSeverity: Critical (9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

egOS WebGUI | All versions prior<\/a> to the vendor patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit works by leveraging the embedded JWT secret<\/a> key in the egOS WebGUI backend. An unauthenticated remote attacker<\/a> can read this key and generate valid HS256 tokens. These tokens can then be used to bypass the authentication\/authorization mechanisms in place, effectively providing the attacker unrestricted access to the system<\/a>. This can lead to unauthorized<\/a> actions such as data manipulation, data theft, or even a complete system compromise.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of how this vulnerability might be exploited:<\/p>\n

import jwt\n# Read the JWT secret key\nsecret_key = read_jwt_secret_key_from_egos_webgui()\n# Generate a valid HS256 token\npayload = {\"admin\": True}\ntoken = jwt.encode(payload, secret_key, algorithm='HS256')\n# Use this token to bypass authentication\/authorization\nheaders = {\"Authorization\": f\"Bearer {token}\"}\nresponse = requests.get(\"http:\/\/target.example.com\/protected\/resource\", headers=headers)<\/code><\/pre>\n
In this conceptual example, an attacker reads the JWT secret key from the egOS WebGUI backend, generates a valid HS256 token with a payload that includes administrative privileges, and uses this token to bypass authentication<\/a> and access a protected resource.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
The primary mitigation strategy for this vulnerability<\/a> is to apply the vendor-provided patch. If applying the patch is not immediately feasible, organizations can use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation strategy. These can monitor and potentially block anomalous or malicious network traffic, thereby reducing the risk associated with this vulnerability<\/a>. However, it’s crucial to note that these are temporary measures and applying the vendor patch is the recommended long-term solution.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The CVE-2025-41702 vulnerability poses a significant threat to any organization employing egOS WebGUI as a part of their technology stack. The vulnerability lies in the JWT (JSON Web Token) secret key, which is embedded and readable in the egOS WebGUI backend to the default user. This flaw can potentially allow an unauthenticated remote attacker […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[75],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-69789","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-authentication-bypass"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t