Description

Server-side request forgery (ssrf) in Azure Active Directory allows an authorized attacker to elevate privileges over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.9",
  "pubDate": "2026-08-20T22:18:00.877Z",
  "pubdate": "2026-08-20T22:18:00.877Z",
  "executiveSummary": "A Server-Side Request Forgery (SSRF) vulnerability has been identified within Azure Active Directory. This security flaw enables an authorized adversary to execute unauthorized network requests, leading to privilege escalation across the affected infrastructure.\nThe vulnerability directly impacts Azure Active Directory components, exposing organizational environments to lateral movement and unauthorized resource access. The primary risk implication is the potential compromise of sensitive internal services and administrative boundaries that are otherwise inaccessible from external network perimeters.\nTo successfully exploit this vulnerability, an attacker must possess a baseline level of authorization within the system, satisfying specific prerequisite authentication requirements before initiating malicious request payloads.\nThe inherent mechanics of the vulnerability allow the attacker to leverage the trust boundary of the server-side application, coercing it into dispatching crafted requests to internal endpoints. This bypasses standard network segmentation controls and subverts the intended trust architecture of the service.\nOrganizations utilizing the affected product must implement strict validation and filtering mechanisms for outbound requests originating from the server-side component to mitigate the associated risks effectively.",
  "technicalDetails": "The root cause of the vulnerability stems from insufficient validation and sanitization of user-supplied Uniform Resource Identifiers (URIs) or URLs processed by the Azure Active Directory server-side component.\nWhen the vulnerable component accepts and processes these external inputs without rigorous parsing or destination restriction, it introduces a Server-Side Request Forgery vector.\nExploitation of this vulnerability requires the attacker to be an authorized user capable of interacting with the specific functionality that handles external resource retrieval or internal proxying.\nThe attack flow begins when the authenticated attacker crafts a malicious payload containing an internal IP address, loopback address, or restricted service URL instead of a legitimate external resource.\nThe vulnerable Azure Active Directory service accepts this payload and initiates a backend HTTP or network request directed at the specified target.\nBecause the request originates from the internal server hosting Azure Active Directory, it successfully bypasses perimeter firewalls, network access control lists (ACLs), and boundary security controls designed to protect internal assets.\nThe targeted internal service or metadata endpoint interprets the incoming request as a legitimate query originating from a trusted infrastructure component and responds accordingly.\nDepending on the nature of the internal resource queried during the exploitation phase, the server-side application may return sensitive data, configuration details, or administrative tokens back to the attacker.\nIn the context of post-exploitation impact, the retrieved data or unauthorized interaction facilitates privilege escalation, allowing the attacker to transition from a standard authorized user to an elevated administrative status within the network.\nNetwork exposure is defined by the accessibility of the vulnerable service interface, while authentication and privilege requirements mandate that the initiating entity already holds valid credentials and baseline access rights within Azure Active Directory."
}