When people think about cybersecurity, they picture firewalls and antivirus. Maybe endpoint detection. Maybe email filtering. But there's a massive category of risk that most businesses barely think about: the SaaS applications their teams use every day.
The average small business now uses over 100 SaaS applications - everything from Microsoft 365 and Salesforce to project management tools, HR platforms, file sharing services, and industry-specific software. Each one holds data. Each one has user accounts. Each one has API connections to other services. And each one is a potential attack vector that exists entirely outside your network perimeter.
The Three Big SaaS Risks
1. Account Compromise
Every SaaS application your team uses is an account that can be compromised. If an employee's Dropbox credentials are stolen, the attacker has access to every file that employee can see - and possibly files shared across the organization. If their project management tool is compromised, the attacker can see client names, project details, internal communications, and financial data.
The compounding factor is password reuse. Despite years of awareness campaigns, most people still use the same password - or minor variations - across multiple services. Compromise one account, and the attacker tries those credentials everywhere else. This is called credential stuffing, and it's automated, fast, and effective.
2. OAuth and Third-Party App Permissions
This is the risk almost nobody is watching. Every time an employee clicks "Sign in with Google" or "Connect to Microsoft 365" on a third-party application, they're granting that application permissions to access their data. Some of those permissions are benign - reading a user profile. Others are extensive - full access to email, files, or calendar.
A single rogue OAuth connection can give an attacker persistent access to your Microsoft 365 environment that survives password changes. The user changes their password, enables MFA, feels safe - but the malicious app still has a valid token with read/write access to their mailbox. We've seen this in the wild, and it's surprisingly common.
3. Data Sprawl
When your data lives in 100 different SaaS applications, it's functionally impossible to know where all your sensitive data is. Client lists in CRM. Financial data in accounting software. Contracts in document signing platforms. Employee records in HR tools. Health information in benefits platforms. Each of these is a data store with its own security posture, its own access controls, and its own breach notification obligations.
If any of these platforms is breached - and SaaS breaches happen regularly - your data is part of that breach. The question isn't whether your data will be involved in a third-party breach. It's whether you'll know about it when it happens and whether the impact will be limited.
Getting Visibility
The first step in SaaS security is knowing what you're dealing with. SaaS alerting tools monitor your cloud environment for suspicious activity across all connected applications:
- Unusual login patterns (impossible travel, new devices, new locations)
- Changes to security settings (MFA disabled, new admin accounts created, mail forwarding rules added)
- Excessive file sharing or downloading (potential data exfiltration)
- New OAuth connections (third-party apps gaining access to your environment)
- License usage anomalies (accounts that shouldn't be active, or accounts accessing data they normally don't)
This visibility alone is transformative for most businesses. You can't secure what you can't see, and most businesses have zero visibility into what's happening inside their SaaS environment beyond "the login page works."
Protecting SaaS Data
Beyond monitoring, SaaS data needs backup - and this is the part most businesses get wrong. Microsoft 365, Google Workspace, Salesforce, and most other SaaS platforms do not provide comprehensive backup of your data. They protect against infrastructure failure on their end. They do not protect against accidental deletion, malicious insiders, ransomware that syncs encrypted files to cloud storage, or retention policy gaps.
Third-party SaaS backup (like Datto SaaS Protection) creates independent copies of your cloud data - email, files, SharePoint, Teams - that you control. When someone accidentally deletes a critical shared folder, or when a compromised account starts mass-deleting files, you can restore from a clean backup without depending on the SaaS vendor's limited recovery options.
Your SaaS stack is your business. Treating it as an afterthought in your security strategy is a gap that grows wider with every new application you adopt. The good news is that the tools to monitor, protect, and back up SaaS environments have matured significantly - making this a solvable problem for businesses of any size.