HTTPS, security headers, cookie safety, and public hardening signals.
Anthropic’s Mythos Preview is being held back because it can find serious vulnerabilities at scale. That shifts the security baseline for every team, even if you never use AI directly.
Read articleLearn how Scavo checks live Set-Cookie headers for Secure, HttpOnly, SameSite, and prefix-rule mistakes so session and auth cookies are not left too loose.
Open guideLearn how Scavo checks critical browser security headers, including weak or invalid values, so your live responses are not giving a false sense of protection.
Open guideXSS accounts for approximately 20% of reported web vulnerabilities across all industries (OWASP, 2024). A strong CSP is your primary defence — yet only 21.9% of sites have adopted CSP (HTTP Archive, 2025), and 91% of those still include unsafe-inline, making the policy ineffective. Without CSP, a single compromised third-party script or input field can steal user data, inject malware, or deface your site.
Open guideOnly 17.5% of the top 1 million HTTPS websites have HSTS enabled, dropping to just 7% across the entire web (HTTP Archive, 2024). Without HSTS, attackers on the same network can perform SSL stripping — intercepting the initial HTTP request and serving malicious content before your redirect to HTTPS kicks in. This is especially dangerous for users on public Wi-Fi, where these attacks are trivial to execute.
Open guideGoogle has used HTTPS as a ranking signal since 2014, and 86.9% of websites now use HTTPS (W3Techs, 2025). If your site doesn't redirect HTTP to HTTPS, visitors land on an unencrypted connection where data can be intercepted. Search engines also treat HTTP and HTTPS as separate URLs, splitting your ranking authority between two versions of every page.
Open guideChrome now automatically blocks mixed content on HTTPS pages — meaning HTTP-loaded scripts and resources simply won't work (Chrome Security, 2024). This breaks page functionality silently: images disappear, styles fail to load, and interactive features stop working. Your users see a degraded experience without understanding why, and search engines flag it as a sign of poor maintenance.
Open guideAn expired SSL certificate completely blocks visitors — 84% of users will abandon a purchase when they see a browser security warning (SSL.com, 2024). In the Keyfactor 2024 PKI Report, 45% of enterprises experienced downtime from certificate issues, with the average outage costing over $1.1M. Even Google's own Bazel project went down in December 2025 when a cert expired. This is one of the few issues that stops 100% of traffic until fixed.
Open guideHow to roll out CSP, HSTS, and critical headers safely, without breaking core user flows.
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