What Is Weak TLS?
TLS encrypts traffic between your users and your server, but a misconfigured TLS setup undermines that protection. Allowing deprecated protocols like TLS 1.0/1.1 exposes you to downgrade attacks (POODLE, BEAST) that can expose encrypted traffic — including payment and session data. Weak cipher suites, expired or mismatched certificates, and missing HSTS round out the common findings. We scan your live TLS configuration.
How Weak TLS Shows Up
Deprecated protocols enabled
TLS 1.0 and 1.1 are vulnerable to downgrade and protocol attacks. Only TLS 1.2 and 1.3 should be allowed.
Weak cipher suites
Ciphers without forward secrecy, or known-weak ones (RC4, 3DES), let captured traffic be decrypted.
Certificate problems
Expired, self-signed, mismatched, or incomplete-chain certificates break trust and enable interception.
Missing HSTS
Without HSTS, a single plaintext request can be downgraded and intercepted before HTTPS is enforced.
How the Sable Scan Detects It
Protocol & cipher analysis
We test which TLS versions and cipher suites your server accepts and flag the weak ones.
Certificate validation
We check certificate validity, chain, and expiry.
HSTS grading
We verify HSTS presence, max-age, and includeSubDomains as part of your headers grade.
Check Your App for Weak TLS
Create a free account and let the agents test your app. Every finding is validated with a proof-of-concept and remediation. 150 founder credits, no credit card.
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