Description

Unauthenticated Privilege Escalation in Jawn <= 1.4.2 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-24T12:16:53.433Z",
  "pubdate": "2026-08-24T12:16:53.433Z",
  "executiveSummary": "An unauthenticated privilege escalation vulnerability has been identified in Jawn versions 1.4.2 and below. This security flaw allows remote, unauthenticated attackers to bypass authorization controls and escalate their privilege level within the application without requiring any prior access credentials. The vulnerability poses a severe risk to the confidentiality, integrity, and availability of affected systems, as successful exploitation grants unauthorized users administrative or elevated access rights to perform restricted operations.\nThe core issue stems from inadequate validation of security contexts and missing authentication checks within the privilege management routines of the application. An attacker with network access to the target system can exploit this weakness by submitting maliciously crafted requests designed to manipulate session states or role assignments directly. Because the application fails to adequately verify whether the incoming request originates from an authenticated and authorized entity, it processes the request and implicitly grants elevated privileges.\nOrganizations utilizing vulnerable instances of Jawn face significant risk of unauthorized system manipulation, data compromise, and potential full administrative takeover. Remediation requires immediate attention, focusing on updating the affected software to a patched version once available, or implementing stringent network-level access controls and monitoring mechanisms to detect and block unauthorized privilege elevation attempts.",
  "technicalDetails": "The vulnerability resides within the authorization and privilege assignment logic of Jawn versions <= 1.4.2. Specifically, the application components responsible for handling user roles and session contexts fail to enforce mandatory authentication and authorization checks before processing state-changing requests related to user privileges.\nRoot Cause: The underlying root cause is the absence of rigorous access control enforcement within the request handling pipeline. The application trusts incoming unauthenticated requests or fails to properly validate the cryptographic tokens and session identifiers associated with the execution context, allowing external entities to invoke sensitive administrative functions directly.\nAttack Vector and Flow: The attack vector is entirely network-based and does not require local access or valid user credentials. The attack flow begins with an unauthenticated adversary sending a specially crafted HTTP request targeting the vulnerable endpoint or function responsible for privilege modification. Due to the lack of strict input validation and missing security context verification, the vulnerable component processes the payload, alters the underlying user or session object, and assigns elevated privileges to the requester.\nAuthentication and Privilege Requirements: Exploitation requires zero authentication and zero prior privileges, classifying the vulnerability as an unauthenticated privilege escalation vector exposed directly via the network layer.\nPayload Behavior and Post-Exploitation Impact: Upon successful execution of the exploit payload, the attacker's session or associated identifier is updated with administrative privileges within the application scope. This post-exploitation state grants the attacker unrestricted access to sensitive functionalities, data repositories, and internal application controls, effectively compromising the entire security boundary of the Jawn deployment."
}