99 Types of Application Security Vulnerabilities Every Organization Should Know

Introduction

Application security (AppSec) is a critical component of modern software development. With the rapid evolution of cyber threats, organizations must be aware of the diverse vulnerabilities that attackers exploit. This article outlines 99 different types of application security vulnerabilities, categorized by security domain.

1. Injection Attacks

1. SQL Injection (SQLi)

2. Command Injection

3. LDAP Injection

4. XML External Entity (XXE) Injection

5. Code Injection

6. Server-Side Template Injection

7. Log Injection

8. CRLF Injection

9. NoSQL Injection

10. Expression Language Injection

2. Cross-Site Scripting (XSS) Attacks

11. Stored XSS

12. Reflected XSS

13. DOM-based XSS

14. Self-XSS

15. Blind XSS

16. Mutation-based XSS

17. PostMessage XSS

18. Client-Side Template Injection

19. Universal XSS (UXSS)

20. WebSocket XSS

3. Authentication and Session Management Vulnerabilities

21. Weak Password Policies

22. Default Credentials Left Unchanged

23. Missing Multi-Factor Authentication (MFA)

24. Credential Stuffing Vulnerability

25. Session Fixation

26. Session Hijacking

27. Token Theft / JWT Manipulation

28. Improper Logout Implementation

29. Insecure Remember Me Functionality

30. Open Redirect Leading to Phishing

4. Authorization and Access Control Issues

31. Broken Access Control

32. Insecure Direct Object References (IDOR)

33. Missing Role-Based Access Control (RBAC)

34. Missing Attribute-Based Access Control (ABAC)

35. Vertical Privilege Escalation

36. Horizontal Privilege Escalation

37. Bypassing Authentication via Forced Browsing

38. Unprotected API Endpoints

39. Improperly Configured OAuth 2.0

40. Overly Permissive Authorization Policies

5. Data Exposure and Privacy Violations

41. Hardcoded Secrets in Source Code

42. Insufficient Transport Layer Protection (No HTTPS)

43. Unencrypted Sensitive Data in Transit

44. Unencrypted Sensitive Data at Rest

45. Exposure of Personally Identifiable Information (PII)

46. Weak or Outdated Cryptographic Algorithms

47. Improper Key Management Practices

48. Information Leakage via HTTP Headers

49. Exposed Database Backups

50. Leaky Error Messages Revealing System Details

6. Security Misconfigurations

51. Default Admin Pages Left Accessible

52. Directory Listing Enabled

53. Unrestricted File Uploads

54. Improper CORS (Cross-Origin Resource Sharing) Configuration

55. Exposed Debugging or Verbose Logging Information

56. Open Ports and Unnecessary Services Running

57. Overly Permissive Cloud Storage (e.g., Open S3 Buckets)

58. Unpatched Third-Party Components

59. Misconfigured Permissions on Critical Files

60. Insecure API Gateway Configuration

7. Business Logic Flaws

61. Price Manipulation via Parameter Tampering

62. Unvalidated Discount Coupon Manipulation

63. Bypassing Rate Limits (Brute Force Attack)

64. Missing Authorization Checks on Critical Actions

65. Improper Input Validation Leading to Business Process Manipulation

66. Insecure Payment Processing Flows

67. Account Takeover via Weak Account Recovery Mechanisms

68. Exploiting Weak CAPTCHA Implementations

69. Time-of-Check to Time-of-Use (TOCTOU) Issues

70. Logic Bombs Injected into Business Workflows

8. API and Web Services Security Issues

71. Insecure Cross-Origin Resource Sharing (CORS) Policy

72. Insufficient API Rate Limiting & Abuse Protection

73. CSRF (Cross-Site Request Forgery) Attacks

74. Broken API Authentication

75. Exposing Internal APIs to Public Networks

76. Excessive Data Exposure via API Responses

77. Improper Use of OAuth & OpenID Connect (OIDC)

78. API Endpoint Enumeration Leading to Information Disclosure

79. Server-Side Request Forgery (SSRF)

80. Broken GraphQL Query Security

9. Mobile and Client-Side Security Issues

81. Insecure Storage of Credentials in Mobile Apps

82. Lack of Jailbreak/Root Detection

83. Exposed API Keys in Mobile Applications

84. Reverse Engineering of Mobile Applications

85. Insecure Inter-Process Communication (IPC)

86. WebView Vulnerabilities in Hybrid Apps

87. Weak Certificate Pinning Implementation

88. Insufficient Protection Against Man-in-the-Middle (MITM) Attacks

89. Code Injection via Mobile App Debug Features

90. Improper Use of WebSockets in Mobile Apps

10. Cloud and Container Security Vulnerabilities

91. Unprotected Docker Daemon Exposure

92. Insecure Kubernetes API Configuration

93. Misconfigured IAM Roles in Cloud Platforms

94. Hardcoded Cloud Storage Keys in Source Code

95. Exposed Serverless Functions Without Authentication

96. Lack of Least Privilege for Cloud Services

97. Open Storage Buckets (S3, Azure Blob, Google Cloud Storage)

98. Failure to Patch Container Images Regularly

99. Publicly Accessible Cloud Admin Consoles

Conclusion: Strengthening Application Security

Understanding the wide range of AppSec vulnerabilities is crucial for developing secure applications. While automated security tools like Snyk, GitHub Security, and Checkmarx can identify these issues, effective remediation requires clear ownership and accountability.

Why You Need a RACI-Based Approach for Remediation

Using ezRACI, organizations can:

• Assign responsibility (RACI) for vulnerability fixes.

• Ensure security teams and developers collaborate efficiently.

• Track remediation timelines with Kanban and Gantt views.

• Automate alerts and compliance reporting.

By leveraging ezRACI, organizations can move from reactive vulnerability management to a proactive, structured, and accountable security strategy.

Take Action Now

Want to improve your AppSec remediation process? Learn how ezRACI can help streamline vulnerability management with automated role assignments, tracking, and compliance enforcement. Schedule a demo today!