Web & API security
Beyond the network layer, Vulny tests your web applications and APIs for the issues that lead to real breaches.
What does Vulny’s web application scanner test for?
Vulny’s web application scanner tests your sites for the weaknesses that most often turn into real breaches. It safely probes every web service it finds for OWASP Top 10 classes — injection, cross-site scripting (XSS), broken access control and security misconfiguration — alongside exposed sensitive files such as backups, .git directories and environment files, missing or weak security headers, default pages that should never be public, and weak TLS configuration. Detection templates are updated continuously, so the scanner keeps checking for newly disclosed web weaknesses rather than a fixed list from the day it shipped. Each issue comes back with its severity, the affected URL and a plain-language fix, so your developers can reproduce and close it without specialist security knowledge. Scanning is non-destructive — Vulny verifies a weakness exists without exploiting it or altering your data.
What is shadow-API discovery and why does it matter?
Shadow APIs are endpoints that exist but are not in your documentation — old API versions, forgotten admin routes, or services a team shipped without telling anyone. They are a favourite target precisely because no one is monitoring them. Vulny crawls your application to map both documented and undocumented API endpoints, then safely fuzzes each one for authentication and authorization flaws and injection bugs, including SSRF, LFI, SSTI and path traversal. The result is a map of your real API surface — including the parts you had forgotten — and exactly where each endpoint is weak. Because modern breaches increasingly happen through APIs rather than the front end, knowing your true API inventory is half the battle: you cannot protect an endpoint you do not know exists. Findings are prioritised by real-world risk so the most dangerous exposures rise to the top.
Is web and API scanning safe to run?
Yes — Vulny’s web and API scanning is non-destructive by design. It identifies and confirms weaknesses without exploiting them, deleting data or taking your services offline, and scans are rate-aware so they do not overload your servers. That makes it safe to run continuously against production rather than only inside a maintenance window. You may only scan assets you own or are explicitly authorised to test; by launching a scan you confirm that authorisation, and Vulny verifies domain ownership before the first scan of any new target. This keeps the scanner both legally and operationally safe: you get the same depth of testing an attacker would attempt, but with none of the risk to availability or data integrity that a real attack — or a careless scanner — would carry.
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