OWASP Top 10 2025: Full Guide to the Latest Web Application Security Risks

The OWASP Top 10:2025 was released on 6 November 2025 at the Global AppSec Conference. It is the eighth edition of the standard awareness document for developers and application security teams, reflecting the most critical web application security risks based on data and community input. This guide explains all 10 categories, with official OWASP references, and how security and cybersecurity services such as VAPT and penetration testing help address them in enterprise and India contexts.

We deliver VAPT and penetration testing, API security testing, and remediation support across India. For the relationship between the OWASP Top 10 and VAPT for web applications, see our earlier article: OWASP Top 10 and VAPT for Web Applications. The official OWASP Top 10:2025 project and introduction are available at owasp.org/Top10/2025 and Introduction – OWASP Top 10:2025.

A01:2025 – Broken Access Control

Broken Access Control remains the top risk in the 2025 list. It appears when applications fail to enforce proper authorization, allowing users to access data or perform actions outside their intended permissions. This includes unauthorized viewing or modification of data, privilege escalation, and bypassing access checks (e.g. by manipulating URLs or API parameters). OWASP reports it was present in a very high proportion of tested applications.

What to do: Enforce access control on every request (server-side), use deny-by-default, avoid exposing object references in URLs, and validate permissions for every action. Penetration testing and reporting help identify missing or weak access controls before they are exploited.

Reference: A01:2025 – Broken Access Control (OWASP)

A02:2025 – Security Misconfiguration

Security Misconfiguration moved up to second place in 2025. It covers insecure default configurations, unnecessary features enabled (e.g. debug, default accounts), missing or weak security headers, and misconfigured or overly permissive cloud or server settings. Such issues are often found across the entire application stack and in 100% of applications in OWASP’s dataset.

What to do: Harden all environments (dev, staging, production), remove or disable unused features and default credentials, implement a secure configuration baseline, and use automated checks where possible. Our network and security solutions and security practices align with reducing misconfiguration risk.

Reference: A02:2025 – Security Misconfiguration (OWASP)

A03:2025 – Software Supply Chain Failures

Software Supply Chain Failures is a new category in the Top 10:2025. It addresses risks introduced through the build, distribution, and update pipeline: vulnerable or malicious third-party components, compromised tooling, and insufficient verification of dependencies. It was ranked as the #1 concern by a large share of community survey respondents.

What to do: Maintain a software bill of materials (SBOM), vet and update dependencies regularly, use signed artifacts and integrity checks, and restrict build and deployment permissions. Cybersecurity and risk assessments can include supply chain and dependency review.

Reference: A03:2025 – Software Supply Chain Failures (OWASP)

A04:2025 – Cryptographic Failures

Cryptographic Failures (formerly “Sensitive Data Exposure”) focus on failures related to protecting data in transit and at rest. This includes use of weak or deprecated algorithms, missing encryption, improper key management, and exposing sensitive data through errors or misconfiguration.

What to do: Classify data and apply strong encryption for sensitive data at rest and in transit (e.g. TLS 1.2+), use approved algorithms and key lengths, and avoid storing unnecessary sensitive data. BFSI and regulated sectors often need explicit alignment with cryptographic standards; our BFSI compliance insights apply to data protection as well.

Reference: A04:2025 – Cryptographic Failures (OWASP)

A05:2025 – Injection

Injection flaws occur when untrusted data is sent to an interpreter (SQL, OS, LDAP, or others) and executed or evaluated. This can lead to data loss, corruption, or full host takeover. Common forms include SQL injection, command injection, and LDAP injection.

What to do: Use parameterized queries or prepared statements, avoid constructing commands or queries from user input, apply input validation and output encoding, and use least-privilege accounts. API security testing and VAPT routinely include injection testing.

Reference: A05:2025 – Injection (OWASP)

A06:2025 – Insecure Design

Insecure Design covers risks that arise from missing or flawed security design: lack of threat modeling, weak business logic, and design choices that make attacks easier. It is about fixing security at the design phase rather than only at implementation.

What to do: Integrate threat modeling and secure design review into the development lifecycle, define and enforce secure design patterns, and treat business-logic abuse as a first-class threat. Our security solution and assessment engagements can include design and architecture review.

Reference: A06:2025 – Insecure Design (OWASP)

A07:2025 – Authentication Failures

Authentication Failures (previously “Identification and Authentication Failures”) include weak or default credentials, session fixation, poor credential recovery flows, and missing or weak multi-factor authentication. Attackers exploit these to impersonate users or take over accounts.

What to do: Implement strong password and MFA policies, use secure session management (e.g. rotation, secure cookies), and avoid default credentials. Penetration testing and managed security services can validate authentication and session handling.

Reference: A07:2025 – Authentication Failures (OWASP)

A08:2025 – Software and Data Integrity Failures

This category covers failures to verify software or data integrity at runtime or update time. It includes deserialization of untrusted data, use of plugins or libraries from untrusted sources without integrity checks, and insecure CI/CD or update mechanisms. It sits alongside A03 (Supply Chain) but focuses on integrity at the application level.

What to do: Use digital signatures or integrity checks for updates and dependencies, avoid deserializing untrusted data without validation, and secure the CI/CD pipeline. Cybersecurity assessments can include integrity and update-process review.

Reference: A08:2025 – Software or Data Integrity Failures (OWASP)

A09:2025 – Security Logging and Alerting Failures

Security Logging and Alerting Failures (previously “Security Logging and Monitoring Failures”) emphasize missing or inadequate logging and alerting. Without sufficient logs and alerts, attacks go undetected and incident response is delayed. The 2025 name change highlights the need for actionable alerting, not only logging.

What to do: Log authentication, access control, and input-validation events; protect logs from tampering; and ensure alerts are tuned and actionable. Managed services and security operations can include log and alert design and review.

Reference: A09:2025 – Security Logging and Alerting Failures (OWASP)

A10:2025 – Mishandling of Exceptional Conditions

Mishandling of Exceptional Conditions is new in 2025. It covers improper handling of errors and exceptions: revealing stack traces or internal details to users, failing to handle edge cases safely, and logical errors triggered by abnormal conditions. OWASP maps many CWEs to this category.

What to do: Use generic user-facing error messages, log detailed errors securely, and validate and handle all exception paths so that failures do not leave the application in an insecure state. OWASP-aligned VAPT and API security testing often probe error handling and edge cases.

Reference: A10:2025 – Mishandling of Exceptional Conditions (OWASP)

Using the OWASP Top 10 in Your Programme

Use the Top 10 as a baseline for secure development, procurement, and assessment. Align VAPT scope and remediation priorities with the categories that apply to your applications and infrastructure. For web and API workloads, combine the OWASP Top 10 with API security testing and, where relevant, BFSI or sector-specific compliance requirements.

We deliver security solutions and cybersecurity services across India — including VAPT and penetration testing, API security testing, remediation and reporting, and managed services. For a tailored proposal or to discuss OWASP Top 10 and application security, use the contact options below.