A SaaS security review should not be a loose checklist. It should be a scoped, evidence-based process that identifies SaaS-related risks, assigns owners, prioritizes findings, and tracks each issue to verified remediation or documented residual-risk acceptance.
Think of the process below as guidance you can adapt, not as some mandatory standard. A risk-based approach is consistent with the way the NIST Cybersecurity Framework 2.0 frames cybersecurity work: organizations should understand, assess, prioritize, and communicate risk in a way that fits their environment.
What Is a SaaS Security Review?
In this guide, a SaaS security review means a structured, evidence-based assessment used to identify, prioritize, and track SaaS-related security risks.
The target may be:
- a single SaaS vendor or application;
- an internal estate of SaaS tools, users, integrations, and data flows;
- an organization’s own SaaS product, including application, API, cloud, or CI/CD components.
A useful review produces more than observations. Not just a list. It should produce:
- scope and review objectives;
- evidence collected and its source;
- findings with severity and business context;
- accountable owners;
- remediation actions;
- retest or closure evidence;
- residual-risk decisions where fixes are not completed.
Consider triggering a review when risk changes: before onboarding a high-impact SaaS application, before renewal, after a material configuration or architecture change, following an incident, before an enterprise customer review, during compliance readiness work, or as part of your organization’s own risk-based cycle.
A SaaS security review is not automatically a penetration test, formal compliance audit, supplier questionnaire, or inventory project. Those activities may feed into the review or follow from it, but they answer different questions.
Choose the Right Type of SaaS Security Review
Start by naming the review type, otherwise the team may mix procurement due diligence, internal governance, product testing, and audit preparation into one unclear exercise.
| Review type | Primary question | Typical scope | Common owners | When to use |
|---|---|---|---|---|
| SaaS app/vendor review | Should we use or continue using this vendor? | One SaaS vendor or app | Security, GRC, procurement, business owner | Procurement, renewal, supplier-risk review, customer-risk management |
| Internal SaaS estate audit | Are our SaaS apps configured and governed safely? | Many SaaS apps, users, integrations, data flows | IT, security, SaaS admins, business owners | Shadow IT review, access review, compliance readiness, consolidation |
| SaaS product/platform technical assessment | Is our own SaaS product secure enough for the decision at hand? | Application, APIs, cloud, CI/CD, dependencies | Engineering, security, product, platform owners | Pre-launch, major release, customer assurance, architecture change |
| Pen test or formal compliance audit | Do we need independent exploit validation or attestation-oriented evidence? | Defined technical or audit scope | Security, GRC, external assessor where applicable | High-risk systems, customer requirement, audit or attestation need |
For supplier decisions, a vendor due-diligence assessment examines relevant information about a supplier or product so informed acquisition or existing-system decisions can be made, as described in NIST SP 1326. That may include questionnaires, reports, contractual requirements, and risk decisions, but it is not the same as testing your own SaaS estate.
The SaaS Security Review Process From Scope to Closure
Run the review as a controlled workflow. That sounds a bit cleaner than it usually is. The exact depth should match the risk, available evidence, and decision the review must support.
- Define scope and objectives
Identify the app, estate, product, environment, users, integrations, data types, and business process in scope. State the decision the review must support: approve a vendor, reduce exposure, prepare for customer assurance, validate a release, or close audit-readiness gaps. - Assign owners
Name a review lead, application or SaaS admin owner, business owner, GRC owner, and engineering or platform owner where applicable. Also decide who can approve residual risk if a finding cannot be fully remediated. - Inventory assets and classify data
Capture apps, users, roles, privileged accounts, integrations, APIs, data types, logs, and cloud dependencies where relevant. Tier the scope by business criticality, exposure, and sensitivity so effort is not spent equally on low-risk and high-impact systems. - Collect evidence
Evidence may include screenshots, exports, configuration states, access lists, logs, policies, tickets, previous reports, and reviewer notes. Record the source, date, owner, and review period so the evidence can be understood later. - Review control areas
Examine identity, configuration, integrations, data exposure, logging, and, where the scope is your own SaaS product, application, API, cloud, and CI/CD controls. - Score and prioritize findings
Do not rank findings only by technical weakness. Include exploitability, affected data, affected users, exposure, business criticality, compensating controls, and contractual or regulatory relevance where applicable. - Report findings
Separate executive decisions from technical detail. Leaders need the risk, impact, owner, deadline, and decision required. Operators need the evidence, affected objects, reproduction notes, and remediation steps. - Remediate, retest, and close
Convert findings into tracked actions. Set closure criteria that require either verified remediation or documented acceptance of the remaining risk. NIST SP 800-30 Rev. 1 supports the broader principle that documented risk assessments help decision-makers respond to identified risks, including mitigation and residual-risk decisions.
What to Check During a SaaS Security Review
Use the review areas below as a practical structure. Adapt them to the SaaS application’s capabilities and the review type.
Inventory and data classification
Confirm what is in scope before judging whether it is secure. Check approved applications, app owners, user counts, privileged roles, sensitive data types, business criticality, and external exposure.
The output should be a scoped inventory with risk tiers. Without this, findings are hard to prioritize because the team cannot tell whether an issue affects a low-use tool or a business-critical system containing customer-sensitive data.
Identity and access
Review SSO and MFA coverage where supported, privileged accounts, dormant users, joiner/mover/leaver handling, service accounts, shared accounts, and excessive permissions.
Access evidence should show who has access, what level of access they have, how authentication is enforced, and whether access is still justified. The CIS Critical Security Controls v8 support using inventories of accounts, service accounts, authentication systems, audit-log processes, and risk-based remediation processes as evidence inputs, while recognizing that not every SaaS product exposes the same controls or exports.
Configuration and security policies
Review tenant-level settings, admin policies, password or session settings where relevant, sharing controls, default configurations, data export options, and security features that are available but not enabled.
The output should identify risky settings, missing administrative controls, and configuration decisions that need owner approval. Capture configuration evidence at the time of review; a written statement that “settings were checked” is weak evidence without a source.
Third-party integrations and OAuth/API access
List connected applications, OAuth grants, API keys, webhooks, service accounts, scopes, permissions, data access, and integration owners.
The most useful output is an integration register that distinguishes active business integrations from stale, ownerless, or over-permissioned connections. For high-risk integrations, record what data can be accessed and who can revoke or rotate credentials.
Data exposure and sharing
Review public links, external collaborators, shared workspaces, sensitive files or records, export settings, retention or deletion settings where relevant, and externally accessible data stores.
The output should identify exposed data, affected owners, sensitivity, and remediation steps such as removing public links, restricting external sharing, changing defaults, or documenting an approved exception.
Logging and monitoring
Confirm whether audit logs are available, which events are captured, how long relevant logs are accessible, and whether admin activity, authentication events, integration activity, and high-risk changes are reviewed or ingested into monitoring systems where applicable.
The output should be clear about what can be monitored, what cannot, and clear about what compensating process exists if the SaaS application has limited logging.
Application, API, cloud, and CI/CD testing where applicable
Use this area only when the review covers your own SaaS product or platform. Relevant checks may include authentication, authorization, session management, input validation, business logic, client-side behavior, API authorization, secrets exposure, dependency risk, cloud storage exposure, and CI/CD controls.
The OWASP Web Security Testing Guide describes web and API testing areas that can be selected and tailored to the application and organizational requirements. Do not treat a governance review as a substitute for a scoped penetration test when the decision requires active exploit validation.
SaaS Security Review Evidence Matrix
Use this matrix as an adaptable example. It is not a standard, audit requirement, or complete control mapping. Evidence availability varies by SaaS product, license tier, integration model, and administrative permissions.
| Review area | Evidence to collect | Likely owner | Source/system | Review output | Common evidence quality issue |
|---|---|---|---|---|---|
| SaaS inventory | App list, business owner, purpose, user count, criticality | IT, SaaS operations, business owner | SaaS management tool, IdP, finance/procurement records | Scoped app inventory and risk tiering | Inventory misses shadow apps or ownerless tools |
| User and privileged access | User export, admin role export, group membership, service accounts | SaaS admin, IAM owner | SaaS admin console, IdP, directory | Access findings and access-review sample | Export lacks role detail or point-in-time date |
| SSO/MFA configuration | SSO settings, MFA policy, exception list where supported | IAM owner, SaaS admin | IdP, SaaS security settings | Authentication coverage and exceptions | Screenshots do not show policy scope or affected users |
| Terminated-user sample | HR termination sample, deprovisioning ticket, account status | HR, IT, IAM owner | HRIS, ticketing system, IdP, SaaS console | Joiner/mover/leaver effectiveness evidence | Sample cannot be traced from HR event to SaaS removal |
| Connected apps/OAuth grants | Integration list, scopes, API keys, webhooks, owner | SaaS admin, integration owner, engineering | SaaS admin console, developer settings, IdP | Integration risk register | Integrations have no named owner or business purpose |
| Admin settings | Security configuration export or screenshots, change history where available | SaaS admin, security | SaaS admin console | Configuration findings and approved exceptions | Evidence shows setting value but not tenant or timestamp |
| Data sharing/public links | Public link report, external collaborator list, shared workspace export | Data owner, SaaS admin | SaaS console, DLP/CASB/SSPM where used | Data exposure findings | Report excludes inherited sharing or external groups |
| Audit log availability | Log settings, sample events, retention view, SIEM ingestion confirmation where applicable | Security operations, SaaS admin | SaaS audit logs, SIEM, logging pipeline | Monitoring coverage and gaps | Logs are viewed but not exported or tied to review period |
| Incident or alert review | Relevant alerts, incident tickets, investigation notes, closure status | Security operations, incident owner | SIEM, case management, ticketing | Known-issue context and recurring risk | Alerts are not linked to remediation or ownership |
| API/application/cloud evidence | Test scope, selected test results, cloud exposure evidence, CI/CD control evidence | Engineering, security, platform | Appsec tools, cloud console, CI/CD system, code repository | Technical findings for product/platform scope | Evidence is too broad, tool-only, or not mapped to affected component |
| Remediation and closure | Ticket, fix evidence, retest result, reviewer sign-off, residual-risk approval | Finding owner, review lead, risk approver | Ticketing system, SaaS console, code repo, GRC system | Closed finding or accepted residual risk | Ticket marked closed without proof that the issue changed |
How to Score, Report, and Prioritize SaaS Security Findings
Use a scoring model that fits your organization’s risk process. The example below is editorial guidance, not a formal scoring standard.
| Factor | Low | Medium | High |
|---|---|---|---|
| Data sensitivity | No sensitive data | Internal business data | Customer-sensitive, regulated, or highly confidential data |
| Exposure | Internal-only access | Limited external access | Public or broad external exposure |
| Privilege impact | Standard user impact | Admin or elevated role impact | Tenant-wide or production-impacting control |
| Exploitability | Hard to abuse | Requires specific conditions | Easy to abuse or already exposed |
| Affected users/data | Small, contained population | Department or workflow level | Broad user base or critical dataset |
| Business impact | Limited disruption | Department-level impact | Critical service, customer, or revenue impact |
| Compensating controls | Strong control already reduces risk | Partial control exists | No meaningful compensating control |
A finding should basically include enough context for a decision-maker to understand both the technical issue and the business consequence.
| Tracker field | What to record |
|---|---|
| Finding ID | Unique reference for the issue |
| Finding summary | Plain-language risk statement |
| Evidence source | Screenshot, export, log, ticket, test result, or report |
| Severity / priority | Rating based on the organization’s adapted scoring model |
| Likelihood / exploitability | How feasible abuse is under current conditions |
| Business impact | Affected service, users, data, customers, or obligations |
| Owner | Person or team accountable for remediation |
| Due date | Target date based on priority and business constraints |
| Remediation action | Specific change required |
| Status | Open, in progress, blocked, remediated, retest pending, closed, accepted |
| Closure evidence | Export, screenshot, merged fix, deployment record, access approval, removed integration record |
| Retest result | Pass, fail, partial, or not applicable |
| Residual-risk approval | Approver, rationale, date, review condition |
The report should produce four outputs: an executive summary, a technical findings list, a remediation tracker, and a record of risk decisions. Keep the executive summary focused on decisions: what is high risk, who owns it, what must happen next, and what risk remains if no action is taken.
Remediation, Verification, and Residual Risk Approval
Discovery does not create risk reduction by itself. Convert each finding into a tracked action with an accountable owner, due date, and expected closure evidence.
Good closure evidence depends on the issue:
- updated configuration export;
- access review approval;
- removed user, role, public link, or integration record;
- SIEM or logging confirmation;
- retest screenshot or test result;
- merged code fix and deployment record;
- ticket with reviewer sign-off;
- documented residual-risk approval.
For high-priority findings, require retesting by someone other than the implementer where practical. If the issue cannot be fully remediated, document the remaining risk, compensating controls, approver, expiration or review condition, and reason for acceptance.
Preserve the evidence package. It can support future reassessments, customer assurance work, internal governance reviews, or formal audit preparation, but it should not be represented as a compliance attestation unless the appropriate formal engagement was performed. That line can get blurry.
Where SaaS Security Reviews End
A SaaS security review should also make clear when another assessment is needed.
- Use a penetration test when the decision requires testing how far a defined system resists active attempts to compromise its security. CISA uses this framing for penetration testing in its TIC 3.0 Remote User Use Case.
- Use a formal compliance examination when the required output is attestation-oriented. For example, a SOC 2 engagement examines a service organization’s system description and controls relevant to the applicable Trust Services Criteria.
- Use a vendor security assessment when the core decision is whether to buy, renew, or continue using a third-party provider.
- Evaluate tooling when many SaaS applications make manual evidence collection, ownership tracking, and posture visibility difficult to maintain.
- Use a cloud or application security assessment when the scope is your own infrastructure, code, APIs, or CI/CD pipeline rather than a third-party SaaS tenant.
The boundary matters because each activity produces different evidence. A review record, a supplier questionnaire, a penetration-test report, and a SOC report are not interchangeable.
Turning SaaS Reviews Into Continuous Security Evidence
A one-time review is easier to defend when it feeds an operating process: evidence owners are known, refresh points are defined, findings remain visible, and risk decisions are traceable.
To reduce stale evidence, keep review outputs connected to:
- system and application inventories;
- access and configuration evidence;
- control ownership;
- remediation tickets;
- vendor questionnaires and customer assurance responses;
- risk decisions and exceptions;
- future audits or reassessments.
Organizations evaluating platforms such as Ciphrix can use this operating model as a lens: the goal is not to replace security judgment or guarantee compliance, but to keep evidence, controls, risks, questionnaires, and review decisions connected over time.
A SaaS security review is valuable when it can prove what was reviewed, what was found, who owns the risk, what changed, and why the remaining risk is acceptable.