Vulnerability scanning is not a one-time event — it is an ongoing process, because websites change constantly. The right scan frequency depends on how often your site changes, how sensitive the data it handles is, and what compliance obligations you have. This guide gives you a practical, risk-based answer.
Why Frequency Matters: What Changes Between Scans
A vulnerability that did not exist yesterday can exist today because of:
- Code deployments: new features introduce new inputs, new endpoints, new logic paths
- Dependency updates: a library update may introduce a new CVE — or remove a critical one
- Configuration changes: a server config update can inadvertently disable a security header or expose a directory
- DNS and infrastructure changes: new subdomains, CDN configuration changes, load balancer updates
- Third-party script updates: a CDN-hosted analytics or chat script can be updated without your knowledge
Each of these events is a potential point of regression. A scan cadence that does not account for these change vectors will miss vulnerabilities that appear between scans.
Recommended Frequency by Risk Profile
Low traffic blog or informational site (no user logins, no payments)
Frequency: Monthly
These sites have a small attack surface and low data sensitivity. A monthly scan catches configuration drift and any new vulnerabilities introduced by CMS updates or plugin changes. If you deploy changes more than once a month, scan after each significant deploy.
E-commerce or site with user accounts
Frequency: Weekly + after every significant deploy
User account data (names, emails, addresses, order history) is valuable to attackers. Payment flows carry PCI DSS implications. Run a weekly baseline scan and an additional scan after any deployment that touches authentication, checkout, or payment flows.
SaaS product or web application with sensitive user data
Frequency: Every deploy + weekly production scan
Continuous deployment means continuous change, and each change is a potential regression point. Integrate a vulnerability scan into your CI/CD pipeline as a deployment gate, and run a weekly scheduled scan of production to catch any drift from config changes or third-party updates that bypass your deployment pipeline.
Financial services, healthcare, or regulated industry
Frequency: Daily or every deploy, plus quarterly formal assessment
Regulatory requirements (PCI DSS, HIPAA, NIS2) mandate formal vulnerability scanning programs. Daily automated scans plus quarterly formal reports with documented remediation are the standard expectation. Some frameworks require scans after any significant infrastructure change as well.
Triggers for an Immediate Unscheduled Scan
Outside of your regular schedule, scan immediately when:
- A public CVE is disclosed affecting a framework, library, or CMS version you use
- You migrate to a new server, hosting provider, or infrastructure setup
- You add a new third-party integration or external script
- A penetration test, bug bounty report, or user complaint suggests a potential vulnerability
- You restore from a backup or roll back a deployment
- A major version upgrade of your web framework or runtime
How Shieldome Fits Your Scan Cadence
Shieldome scans complete in 2–5 minutes, which makes frequent scanning practical at any cadence. You can:
- Scheduled scans: run Shieldome on a weekly or daily basis as part of a cron job or scheduled task that hits the Shieldome API
- Deploy-triggered scans: add a Shieldome scan as the final step in your CI/CD pipeline — your deployment only goes live if the scan returns no new CRITICAL or HIGH findings
- On-demand scans: run immediately from the Shieldome dashboard whenever an unscheduled trigger event occurs
- Scan history: Shieldome stores your scan history so you can compare results over time and demonstrate a continuous scanning program to auditors
Shieldome checks 40+ controls across the OWASP Top 10 (2021) on every scan — SSL/TLS, security headers, sensitive file exposure, injection indicators, cookie security, server disclosure, access control, SRI, CORS, and more. At 2–5 minutes per scan, the cost of running a scan after every deploy is negligible.
Frequently Asked Questions
Is weekly scanning enough for most websites?
For sites that deploy changes infrequently and handle moderate-sensitivity data, weekly is a reasonable baseline. For any site that deploys multiple times per week, weekly scanning will miss vulnerabilities introduced between scans — deploy-triggered scanning is the right approach.
Can I scan too often?
A well-designed passive scanner (like Shieldome) does not cause load problems on your site. You can safely scan as frequently as your needs require. Avoid scanning extremely frequently (every few minutes) if your site has strict rate limiting that would block the scanner.
Does scanning slow down my site?
Shieldome is a passive scanner that sends standard HTTP requests — the same requests a browser would send. It does not perform denial-of-service testing or send large volumes of requests. The impact on site performance is negligible.
What compliance frameworks require vulnerability scanning?
PCI DSS 4.0 (Requirement 6.2.4 and 11.3), SOC 2 (CC7.1), ISO 27001 (A.12.6), HIPAA Security Rule (§164.306), and NIS2 Article 21 all include requirements for vulnerability identification processes. The specific cadence varies by framework.
Should I scan staging as well as production?
Yes — scan staging before promoting to production. This is the most effective point in the pipeline to catch vulnerabilities: after code is integrated but before it is exposed to the public. Scan production separately to catch configuration drift and third-party changes.
The right scan frequency is the one that matches your change velocity. Start with a free Shieldome scan — it takes less than 5 minutes — and build your scanning cadence from there.