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20/08/2026 6:07 pm
TL;DR: SharePoint security risks are driven less by the platform itself than by oversharing, over-permissioned access, stale sites, and weak audit visibility, according to Strac. For IAM and governance teams, the practical issue is that collaboration tools become sensitive data sprawl unless access, logging, and DLP are continuously enforced.
NHIMG editorial — based on content published by Strac: SharePoint Security Best Practices for 2025
By the numbers:
- While 71% of IT teams have been advised on AI agent data access, only 47% of compliance teams, 39% of legal teams, and 34% of executives have the same visibility.
- When AWS credentials are exposed publicly, attackers attempt access within an average of 17 minutes.
Questions worth separating out
Q: What breaks when SharePoint Online permissions are overexposed?
A: Overexposed permissions create visibility beyond intended groups, which turns collaboration convenience into data leakage risk.
Q: Why do collaboration platforms create compliance risk even with MFA in place?
A: MFA protects the login step, but it does not control what a verified user can share, download, or expose once inside the platform.
Q: How should security teams measure whether DLP monitoring is actually working?
A: Measure DLP by outcomes, not alert volume.
Practitioner guidance
- Audit site collection inheritance and guest exposure Map which SharePoint sites inherit permissions, which external sharing links remain active, and which guests still have access after project completion.
- Classify sensitive content before writing DLP rules Identify the data types that live in SharePoint, then apply sensitivity labels and DLP policies to those libraries first.
- Tie audit review to access recertification Use unified audit logs to validate who accessed files, who changed sharing settings, and which sites show unusual download or sharing behaviour.
What's in the full article
Strac's full blog post covers the operational detail this post intentionally leaves for the source:
- Step-by-step SharePoint permission hardening for site, library, and item level access
- Specific Microsoft 365 and Purview configuration guidance for audit logs, sensitivity labels, and DLP
- Remediation examples for risky sharing links, stale sites, and over-permissioned users
- Implementation notes for combining native Microsoft controls with Strac's discovery and remediation workflows
👉 Read Strac's SharePoint security best practices and control guidance →
SharePoint permissions and sharing controls: are your safeguards enough?
Explore further
20/08/2026 6:41 pm
SharePoint security is fundamentally an identity governance problem. The article correctly frames the platform's biggest risk as mismanaged permissions, stale sites, and unrestricted sharing, which are all lifecycle failures. When access is granted once and never revisited, collaboration tools become long-lived exposure surfaces. For IAM and IGA teams, the lesson is that site governance must be tied to ownership, recertification, and removal workflows.
A question worth separating out:
Q: Who is accountable when SharePoint trust material is exposed and reused by attackers?
A: Accountability usually spans application owners, platform engineers, and identity teams because the exposed material functions like a privileged secret. The right governance question is who owns the lifecycle of machine keys, who rotates them after exposure, and who monitors their misuse as part of privileged access control.
👉 Read our full editorial: SharePoint security best practices expose the real collaboration risk
