CVE-2023-36331
Published: 12 January 2026
Summary
CVE-2023-36331 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Exrick Xmall. Its CVSS base score is 8.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 10.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2023-36331 is an incorrect access control vulnerability in the /member/orderList API endpoint of xmall version 1.1. It allows attackers to arbitrarily access other users' order details by manipulating the userId query parameter. The issue stems from improper authorization checks, classified under CWE-639 (Authorization Bypass Through User-Controlled Key), with a CVSS v3.1 base score of 8.2 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N), indicating high confidentiality impact and low integrity impact.
The vulnerability can be exploited remotely by unauthenticated attackers (PR:N) with low complexity and no user interaction required. By crafting requests to the /member/orderList API and altering the userId parameter to target another user's identifier, attackers can retrieve sensitive order details belonging to arbitrary users, potentially exposing personal information, purchase history, and financial data.
For mitigation details, refer to the advisory in the GitHub issue at https://github.com/Exrick/xmall/issues/100.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-40299
Vulnerability details
Incorrect access control in the /member/orderList API of xmall v1.1 allows attackers to arbitrarily access other users' order details via manipulation of the query parameter userId.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct remote exploitation of public-facing web API via authorization bypass (user-controlled key) to access unauthorized data.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces approved authorizations for logical access to order details, directly preventing attackers from bypassing controls via manipulated userId parameters.
Validates the userId query parameter to ensure it matches the authenticated user's identity, mitigating the authorization bypass through user-controlled key.
Limits user privileges to access only their own order data, reducing the scope of unauthorized access enabled by improper API authorization checks.