Improper Privilege Management in Tourism Management System

A vulnerability was identified in jaychouchannel Tourism-Management-System up to 229956e20dbd4a80eeff14535e44d3099502af09. The affected element is an unknown function of the file travel/src/main/java/com/controller/UsersController.java of the component User Register Endpoint. Such manipulation of the argument UsersEntity leads to improper privilege management. The attack can be launched remotely. The exploit is publicly available and might be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The name of the patch is 84d8ec384f669df3985293dab293bb7b477efa64. Applying a patch is advised to resolve this issue.

Casky was already ahead

This CVE exploits attack patterns that Casky's 224matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2026-90523 is an improper privilege management vulnerability in the jaychouchannel Tourism-Management-System's User Register Endpoint. The flaw exists in the UsersController.java component where user-supplied input to the UsersEntity parameter is not properly validated before processing, allowing attackers to manipulate privilege assignments during user registration or profile updates. This is a critical issue affecting any deployment of this tourism management platform, particularly those handling customer accounts, administrative functions, or sensitive booking data. Remote exploitation requires no authentication, making this accessible to unauthenticated threat actors who can escalate their privileges to administrative levels or modify other users' permissions.

Casky's 224 matched security skills leverage Claude AI with extended reasoning to detect the privilege escalation patterns behind TA0004 (Privilege Escalation) techniques. Practitioners using Casky would identify attack indicators such as anomalous User Register endpoint requests containing privilege-escalating parameter manipulations, unexpected role assignments in UsersEntity objects, or API calls that bypass normal authorization checks. The platform's skill mapping correlates CWE-266 (Incorrect Privilege Assignment) and CWE-269 (Improper Access Control) patterns with actual attack telemetry, enabling detection of POST/PUT requests to travel/src/main/java/com/controller/UsersController.java with modified role or permission fields. Security teams would surface findings showing suspicious account creation events with elevated privileges, failed authorization validations, and privilege mutations that deviate from baseline user registration workflows.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

224 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-90523.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004

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