Authorization Weaknesses in Web Applications Lead to Data Breaches

Severity: Medium (Score: 51.1)

Sources: cwe.mitre.org

Published: 2026-05-30 · Updated: 2026-05-30

Keywords: resource, consumption, crash, exit, restart, memory, architecture

Severity indicators: rce

Summary

Recent articles detail vulnerabilities related to authorization weaknesses in web applications, particularly affecting systems that fail to enforce proper access controls. These weaknesses can allow authenticated users to access unauthorized data, potentially leading to data breaches. The vulnerabilities are categorized under CWE-862 and CWE-863, highlighting issues with role-based access control and improper session management. Affected systems include web servers and database servers, with examples illustrating how attackers can exploit these flaws to read sensitive information. The articles emphasize the importance of implementing robust security measures during the architecture and design phases to mitigate these risks. Current status indicates that these vulnerabilities remain prevalent, with no specific patches mentioned. Key Points: • Authorization weaknesses in web applications can lead to unauthorized data access. • CWE-862 and CWE-863 highlight critical flaws in access control mechanisms. • Proper implementation of role-based access control is essential to prevent data breaches.

Detailed Analysis

**Impact** Authorization weaknesses in web applications affect multi-user environments across sectors relying on web and database servers, including healthcare and corporate messaging systems. These flaws enable attackers to access unauthorized sensitive data, such as private messages or medical records, potentially exposing employee information and personal health data. The scope includes any organization deploying web applications without proper role-based access control (RBAC) or server-side enforcement, with no specific geographic limitations provided. Business consequences include data breaches, loss of confidentiality, and potential regulatory penalties. **Technical Details** Attackers exploit improper authorization checks by manipulating session tokens, cookies, or request parameters to access data belonging to other users with the same role (horizontal authorization bypass). Examples include bypassing role verification by altering cookies or accessing private messages by referencing arbitrary identifiers. The weaknesses arise from missing or incorrectly implemented RBAC, lack of server-side enforcement, and assumptions about input integrity. No specific CVEs or malware are mentioned. The attack vector is web application abuse during the authorization phase of the kill chain. **Recommended Response** Enforce RBAC strictly at the server side on every page and ensure all sensitive pages require active, authenticated session tokens with appropriate permissions. Use vetted authorization frameworks such as JAAS or OWASP ESAPI to reduce implementation errors. Prevent caching of sensitive pages and validate that user-specific data requests match the authenticated user’s identity. Deploy automated static and dynamic analysis tools to detect missing or faulty authorization checks, and monitor for anomalous access patterns indicative of horizontal privilege escalation.

Source articles (2)

• 863 — cwe.mitre.org · 2026-05-28
  DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other) Architecture and Design Divide the product into anonymous, normal,…
• 862 — cwe.mitre.org · 2026-05-30
  DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other) Architecture and Design Divide the product into anonymous, normal,…

Timeline

• 2026-05-28 — CWE-863 published: CWE-863 details vulnerabilities in web applications related to authorization weaknesses, emphasizing the need for proper access control.
• 2026-05-30 — CWE-862 published: CWE-862 outlines similar vulnerabilities, stressing the importance of role-based access control in mitigating risks.

Related entities

• Denial of Service (Attack Type)
• Denial Of Service (DoS) (Attack Type)
• Sql Injection (Attack Type)
• CWE-287 - Improper Authentication (Cwe)
• CWE-862 - Missing Authorization (Cwe)
• Cwe-89 - SQL Injection (Cwe)
• Apache (Platform)
• JAAS Authorization Framework (Tool)
• Owasp Esapi (Tool)