CVE-2025-30390: Privilege Escalation Vulnerability in Azure

Overview

The CVE-2025-30390 is a security vulnerability that exploits an improper authorization mechanism in Azure. This vulnerability, if exploited, allows an authenticated attacker to escalate privileges over a network. As such, it poses a severe threat to enterprises that rely on Azure for their cloud computing needs. In this digital age where data is paramount, the potential system compromise or data leakage can have dire consequences on business continuity, reputation, and regulatory compliance.

Vulnerability Summary

CVE ID: CVE-2025-30390
Severity: Critical – CVSS 9.9
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: System compromise or potential data leakage

Affected Products

Product | Affected Versions

Azure | All versions prior to patch

How the Exploit Works

The CVE-2025-30390 exploit takes advantage of a flaw in Azure’s authorization mechanism. An attacker who has already gained low-level access to the system can exploit this vulnerability to escalate their privileges over the network. This escalation could potentially give the attacker administrative control over the system, which would allow them to compromise the system or leak sensitive data.

Conceptual Example Code

The following is a hypothetical example of how the vulnerability might be exploited. An attacker sends a malicious HTTP POST request to a vulnerable Azure endpoint, which incorrectly authorizes the request and allows for the elevation of privileges.

POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "explore_priv_escalation()" }

In this example, `explore_priv_escalation()` is a placeholder for an actual exploit method that an attacker might use.

Mitigation

The most effective method of mitigation for this vulnerability is to apply the vendor patch. Microsoft, the vendor, has released a patch that fixes the authorization flaw, and all Azure users are urged to apply this patch as soon as possible. In the interim, users can use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation method.