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OWASP and MITRE ATT&CK answer different questions, what the flaw is, and what an adversary would do with it. What a report mapped to both actually looks like.
"Do you map findings to OWASP and MITRE ATT&CK?" comes up often enough in scoping conversations that it's worth explaining what the two frameworks actually do, because they're not competing options, and a report that only uses one is missing half the picture.
The OWASP Top 10 is a classification of vulnerability classes, broken access control, injection, cryptographic failures, and so on. It answers the question "what kind of flaw is this?" It's specific to web applications, updated periodically based on real contributed data, and it's the vocabulary most engineering teams already share, which makes it genuinely useful for communicating a finding's category to a development team that needs to fix it.
What it doesn't do is describe how an attacker actually uses that flaw once found, or where it fits in a broader compromise. A broken-access-control finding and a full domain compromise can both trace back to the same OWASP category, but they're wildly different in real-world impact, and OWASP's classification alone doesn't capture that difference.
MITRE ATT&CK is a different kind of framework entirely: a knowledge base of adversary tactics and techniques, organized by what an attacker is trying to accomplish at each stage, initial access, privilege escalation, lateral movement, exfiltration, based on real, observed attack campaigns, not application vulnerability classes. It isn't specific to web applications; it covers the full range of how real intrusions actually unfold, across network, cloud, identity, and endpoint.
Where OWASP tells you what the flaw is, ATT&CK tells you what an adversary would do with it, which technique it enables, and what it would let them reach next.
A report that maps a finding to both frameworks answers two different, necessary questions at once: what needs to be fixed (OWASP's vocabulary, which a developer can act on directly), and how much it actually matters in an adversary-emulation sense (ATT&CK's vocabulary, which tells a security team or auditor how this fits into a realistic attack chain). This is also specifically what genuine adversary emulation looks like in practice, chaining individual findings the way ATT&CK describes real campaigns doing it, rather than reporting each finding as an isolated item.
For organizations evaluating engagements against frameworks that expect demonstrated, adversary-realistic testing, this is directly relevant to how NIS2's Article 21 risk-management measures and DORA's threat-led penetration testing expectations are typically assessed, a report mapped only to CVSS scores or only to OWASP categories doesn't demonstrate that the testing actually modeled real adversary behavior. Mapping to ATT&CK is one of the more concrete ways a report can show that.
Our penetration testing engagements map every finding to both frameworks as standard practice, not an optional add-on, it's how we structure adversary-emulated testing in the first place, not something applied retroactively to a report. For the application-specific version of this same discipline, see our Web & API Security service. For a full breakdown of what each OWASP category actually means in practice, see our companion piece on the OWASP Top 10, explained. For a real example of exactly this kind of chained attack path, see Active Directory attack paths.
Tell us about your environment and goals, we'll help you scope the right engagement.