CVE-2025-28242: Session Hijacking Vulnerability in DAEnetIP4 METO v1.25

Overview

In the dynamic and ever-evolving world of cybersecurity, new vulnerabilities are discovered regularly, making it crucial for organizations to stay updated. One such high-risk vulnerability, CVE-2025-28242, has recently been identified in the DAEnetIP4 METO v1.25. This vulnerability allows attackers to execute a session hijacking attack via improper session management in the /login_ok.htm endpoint. This blog post delves into the details of this vulnerability, its potential impact, and mitigation guidance. Every organization using DAEnetIP4 METO v1.25 is potentially at risk, making it important to understand this vulnerability and take appropriate actions to mitigate it.

Vulnerability Summary

CVE ID: CVE-2025-28242
Severity: Critical (9.8/10)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

Product | Affected Versions

DAEnetIP4 METO | v1.25

How the Exploit Works

The vulnerability is due to improper session management in the /login_ok.htm endpoint of DAEnetIP4 METO v1.25. This flaw allows an attacker to hijack a legitimate user’s session, thus gaining unauthorized access to the system. Using this access, the attacker can potentially compromise the system or leak sensitive data. The exploit can be conducted remotely over the network, and it does not require any user interaction or special privileges, making it a high-risk vulnerability.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This pseudocode demonstrates an HTTP request that could potentially hijack a user’s session.

GET /login_ok.htm HTTP/1.1
Host: vulnerable.example.com
Cookie: sessionid=1234567890abcdef
{ "session_hijack_payload": "..." }

In this example, an attacker sends an HTTP GET request to the /login_ok.htm endpoint with a manipulated session ID. The server, due to improper session management, might accept this session ID and allow the attacker to hijack the legitimate user’s session.

Mitigation Guidance

To mitigate the vulnerability, organizations should apply the vendor-supplied patch. If the patch cannot be applied immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation technique. Cybersecurity teams should also consider conducting regular audits and security assessments to identify and patch vulnerabilities promptly, reducing the risk of exploitation.