Penetration Test Reporting: Is your report effective enough to keep hackers at bay?

Penetration testing, commonly referred to as ‘pen testing,’ is a key component in an organisation’s cyber security framework. It helps organisations identify vulnerabilities and improve their security posture. But what exactly is pen testing, and how can you maximise its benefits?

Skilled cyber security professionals perform pen testing by intentionally targeting applications and networks to evaluate their security strength. These expert technicians utilise their extensive knowledge and specialised tools to thoroughly examine security measures, pinpointing vulnerabilities, misconfigurations, and other potential weaknesses.

However, effective reporting is key to empowering organisations with the necessary information to improve their security defences. Upon completion of a pen test, a report is generated, detailing the identified vulnerabilities, their potential impact, and recommended remediation actions. This report serves as a valuable tool for decision-makers, allowing them to prioritise resources and focus on the most pressing security concerns.

So, what are the essential components of a pen test report to ensure better protection against potential security breaches?

What is penetration testing?

Penetration testing is an authorised, simulated cyberattack designed to find security weaknesses before a real attacker can exploit them. Security specialists intentionally target an organisation’s systems, applications, and networks to identify the actual risks.

While a basic vulnerability scan simply flags potential weaknesses, penetration testers go a step further by attempting to exploit those flaws. They document exactly how far they can penetrate your defences and what sensitive assets they can access along the way. This hands-on approach helps organisations filter out the noise from typically hundreds of automated scanner alerts, showing them which vulnerabilities could actually lead to a critical customer data breach.

These tests can cover external and internal networks, web applications, APIs, wireless systems, physical building security, and even staff’s resistance to social engineering tactics. Beyond uncovering security gaps, regular penetration testing also helps organisations meet strict compliance obligations under standards like ISO 27001, APRA CPS 234, and PCI DSS.

Why penetration test reporting matters

Penetration test reporting matters because the final report is often the only part of the engagement most of the organisation will ever see. While the actual testing typically runs for a few weeks, the resulting report typically circulates for a year or more. The board, auditors, and insurers will review it, and the report will eventually feed back directly into the remediation backlog that engineering teams work from.

A weak report remains in circulation long after the security testing finishes. If the documentation lacks clear insights, the organisation pays the invoice and ticks the compliance box, but the actual security exposure remains wide open. Findings that lack clear evidence are easily disputed by the development teams tasked with fixing them, while recommendations delivered without a practical remediation path that fits the budget cycle are deferred until the next test finds them again.

This operational gridlock becomes an even bigger liability as regulators move toward stricter oversight. APRA CPS 234 has required regulated entities to test the effectiveness of their information security controls through a systematic testing program since 2019. Where testing identifies a material control weakness the entity does not expect to remediate in a timely manner, it has 10 business days to notify APRA. 

Since auditors increasingly demand to see exactly which findings were closed, along with concrete evidence verifying the fix, a vague report leaves the organisation unable to evidence compliance.

Know your audience

The report should speak to two main audience types: executives and technical professionals. Catering to the diverse needs of both executive and technical audiences ensures that the report is not only informative but also actionable.

For executives, it is essential to provide a high-level overview of the security posture, key vulnerabilities, and their potential impact on the organisation. For technical professionals, the report should include detailed information on vulnerability mappings, detection measures, and remediation actions, enabling them to address the identified weaknesses efficiently.

Tailored risk ratings

Accurate risk ratings are essential for organisations to prioritise response efforts and allocate resources for addressing security vulnerabilities. Many testing firms score vulnerabilities using the Common Vulnerability Scoring System (CVSS), and map attacker behaviour against the MITRE ATT&CK knowledge base. However, these serve different purposes: CVSS is used to rate vulnerability severity, while MITRE ATT&CK is used to describe adversary tactics and techniques. Neither framework on its own fully reflects an organisation’s specific environment. A better approach is to assess vulnerabilities based on:

Exploitability: Evaluate ease of exploitation, including exploit availability, attack complexity, and attacker skill level. Prioritise higher exploitable vulnerabilities.

Existing Safeguards: Assess the effectiveness of current security controls and measures, and prioritise vulnerabilities accordingly. Lower priority for vulnerabilities addressed by robust measures.

Likelihood of Successful Exploitation: Consider threat landscape, adversary motivation, and targeted asset value to determine priority based on likelihood of successful exploitation.

Required Attacker Access Levels: Assess vulnerability severity based on required attacker access levels. Remote or minimal privilege vulnerabilities are more severe than those needing physical access or admin privileges.

Customised recommendations

Developing a comprehensive pen test report requires a thorough understanding of the organisation’s specific needs and constraints. One-size-fits-all recommendations can lead to ineffective solutions that do not address the unique aspects of each organisation. Consider the following steps:

Understand the organisation’s operations and risk profile to identify relevant threats and vulnerabilities.

Assess constraints, such as budget and legacy systems, to provide realistic remediation actions.

Offer alternative solutions when upgrading isn’t feasible, like network isolation, access control, and monitoring.

Prioritise remediation actions based on potential impact and likelihood of exploitation.

Provide ongoing support, including regular assessments, training, and guidance.

Communicate effectively with clear, concise language, visuals, and an executive summary for both technical and non-technical stakeholders.

Think outside the box

An effective report chains findings together to show what an attacker could actually achieve. Three medium-severity issues assessed in isolation look tolerable. Chained in sequence, they can produce a path to domain admin, and a report that stops at the individual findings understates the real exposure. Each scenario should state its likelihood, the business impact if it succeeded, and the control that breaks the chain.

This is where threat-led penetration testing becomes useful. Scenarios built from intelligence about the adversaries actually targeting an organisation’s sector and geography carry more weight with a board than a generic list of vulnerabilities, because they describe an attack the organisation can recognise as plausible.

The chain also tends to start somewhere the security team is not looking. Physical testing engagements can begin with a public social media post and end with a device plugged into an unattended workstation, a route a network scan will not surface. A strong penetration test report example documents the full path, from the public information used to build the pretext through to the callback from the command-and-control server, so the organisation can see exactly which control would have stopped it.

Highlight the positives

A balanced pen test report is crucial in assessing an organisation’s cybersecurity posture by highlighting its strengths and weaknesses. The report should identify vulnerabilities and emphasise successful security measures to showcase triumphs, which helps clients appreciate their cybersecurity investments and motivates employees to maintain and improve the security framework. Celebrating security achievements fosters continuous improvement, enabling organisations to stay ahead of emerging threats.

Cyber-remediation checklist

Finally, the testing firm should provide a clear, actionable remediation list alongside the main cybersecurity report. This list should include a brief description of each vulnerability or risk, its priority, and a reference to the report section. The remediation checklist streamlines the process of addressing security concerns, allowing clients to allocate resources and delegate tasks efficiently within their organisation.

Key components of a penetration test report

The average penetration test report typically has an executive summary, scope details, and remediation steps to guide the engineering team. Most penetration test reports contain these core elements alongside structured evidence, but the quality varies widely among providers. This variance is exactly what an organisation should assess when reviewing a draft report. 

To get the most value from the engagement, look for a deep breakdown of these fundamental components:

• Executive summary. A business-level view of the security posture, highlighting the most serious exposures identified and the potential cost if exploited. This section must be fully readable on its own by leaders who will never open the document’s technical body.
• Scope and objectives. A clear outline of what was tested, what was deliberately excluded, and the agreed rules of engagement. This defines the exact boundaries of the assurance being offered, as anything outside it remains unknown.
• Testing methodology. The specific framework and standards followed during the engagement. Documenting this approach lets any finding be reproduced and defended to an auditor months later.
• Risk rating framework. An explanation of how severity was calculated and adjusted for the organisation’s specific circumstances. This provides a transparent framework, giving the client a fair basis to challenge any ratings.
• Detailed findings and evidence. The bulk of the report, where each vulnerability is documented with reproduction steps, supporting evidence, and affected assets. This is the practical section that engineering teams work from directly.
• Remediation recommendations. Specific, prioritised actions that are realistic and achievable within the company’s actual constraints. Where a direct fix is not viable, the report should offer alternative compensating controls instead.
• Conclusion and next steps. An overview of the residual risk left after remediation is complete, along with the date for the scheduled retest. It also pinpoints what the organisation should focus on in the next testing cycle.

Compliance, confidentiality, and reporting considerations

Organisations use penetration test reporting as critical compliance evidence for regulatory frameworks and as a highly sensitive security document requiring strict access controls and lifecycle management. A completed report serves as both a regulatory artefact and a blueprint of organisational vulnerabilities, meaning the way a company manages its distribution, formatting, and retention directly affects its overall risk posture. Balancing these requirements requires careful navigation of legal frameworks, internal data security, and long-term performance tracking.

Regulatory compliance frameworks

Australian regulatory obligations generally call for evidence of testing and remediation rather than a certificate of completion. ISO 27001 requires organisations to manage technical vulnerabilities and to test security controls, and penetration testing is one of the common ways to evidence this.

APRA CPS 234 goes further for regulated entities. Since 2019, it has required them to test the effectiveness of their information security controls through a systematic testing program, and to carry out that testing by appropriately skilled and functionally independent specialists. Where testing identifies a material control weakness the entity does not expect to remediate in a timely manner, it has 10 business days to notify APRA.

Organisations handling payment card data face a separate requirement under PCI DSS, which calls for penetration testing at least annually and after any significant change to the cardholder data environment.

A penetration test finding is not itself a data breach, because the tester is authorised. The Privacy Act 1988 requires organisations to take reasonable steps to protect personal information, and testing helps evidence that. The Notifiable Data Breaches scheme engages only if personal information is subject to unauthorised access or disclosure and serious harm is likely.

Confidentiality and secure distribution

Security teams should treat the distribution of a completed report as a security control in its own right, as the document details precisely how the organisation fell short. Stakeholders must always deliver the final version encrypted and restrict access to specific named recipients, while setting clear retention and destruction dates before the engagement even begins. Unredacted copies frequently pile up in shared drives and ticketing systems, meaning a report forwarded down an internal chain quickly slips out of anyone’s control.

Long-term tracking and reporting

Security leaders track progress over time by enforcing proper version control, establishing a defined retest window, and using consistent risk language across all engagements. Without this consistency, an organisation demonstrates tactical activity but fails to prove whether its actual risk exposure is dropping.

Common challenges in penetration test reporting

Common challenges in penetration test reporting include copy-pasting raw automated scan results, exaggerating the severity of risks, omitting step-by-step technical evidence, offering unrealistic fix recommendations, and skipping follow-up checks to verify fixes. These failures typically stem from poor report-writing standards rather than the technical testing itself. When a report suffers from these flaws, the entire repair process stalls. The organisation faces higher penetration testing costs, while its actual security weaknesses remain completely unchanged

Security leaders can protect their budget and timeline by identifying these specific reporting failures early:

• Tool output presented as findings. Raw scanner exports pasted directly into a report without manual validation produce widespread false positives. When an engineer disproves a single unverified finding, the entire document loses credibility, causing the development team to discount the valid findings alongside it.
• Severity inflation. Rating the vast majority of findings as high or critical strips the ranking system of its value. Teams respond by triaging on pure instinct or by ignoring the queue entirely. As a result, genuinely urgent exposures sit unresolved alongside minor issues.
• Missing reproduction steps. Engineers will dispute a vulnerability if they cannot recreate the issue themselves. Failing to include clear, step-by-step instructions turns the fix process into an ongoing debate about whether the flaw even exists. Including concrete technical details helps close this gap.
• Recommendations that ignore constraints. Advising a client to replace a legacy system does not help within a typical twelve-month budget cycle. Impractical advice that fails to align with financial realities gets deferred, which drives up overall penetration testing costs through repeated retesting without reducing the actual attack surface.
• Skipping the retest. Closing findings based on verbal assurance rather than technical evidence leaves exposures in place and invalidates the compliance record. The next engagement then rediscovers the same vulnerabilities. This forces the organisation to pay twice to reproduce the same findings. 

Four of these five are visible in a redacted sample report before an engagement is even signed. Asking prospective providers for examples of penetration test reports is the cheapest quality control available to an organisation.

How Nexon approaches penetration test reporting

Nexon is a CREST-certified organisation, and its penetration testing is delivered by permanent, Australian-based ethical hackers. The analysis and reporting stage of every engagement is built to produce clear, actionable insights and recommendations.

Every Nexon penetration testing engagement also includes a threat profile analysis, which shows where an organisation is already exposed. It covers mentions on the dark web, breached data and credentials, and references on ransomware forums and underground marketplaces.

Explore Nexon’s cyber security solutions to see how testing fits into a wider security programme. Or contact the Nexon team to scope a penetration test for your organisation.