Deep SSL/TLS Vulnerability Test
This report provides a deep analysis of the SSL/TLS configuration of app.writesonic.com. It checks for protocol support, cipher strength, and known vulnerabilities.
Scan Results
Testing all IP addresses (port 443): 66.33.60.194 76.76.21.93 ----------------------------------------------------- Start 2026-01-04 11:50:37 -->> 66.33.60.194:443 (app.writesonic.com) <<-- Further IP addresses: 76.76.21.93 rDNS (66.33.60.194): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew 0 sec from localtime HTTP Age (RFC 7234) 0 Strict Transport Security 730 days=63072000 s, just this domain Public Key Pinning -- Server banner Vercel Application banner X-Powered-By: Next.js Cookie(s) (none issued at "/") Security headers X-Frame-Options: SAMEORIGIN Cache-Control: private, no-cache, no-store, max-age=0, must-revalidate Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK) FREAK (CVE-2015-0204) not vulnerable (OK) DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK) make sure you don't use this certificate elsewhere with SSLv2 enabled services, see https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=4EEE2BFFB5B930325D243DD39EF1172E9E945EF3BA302EEA2170866D77DB1481 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no common prime detected BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-01-04 11:51:31 [ 64s] -->> 66.33.60.194:443 (app.writesonic.com) <<-- ----------------------------------------------------- Start 2026-01-04 11:51:31 -->> 76.76.21.93:443 (app.writesonic.com) <<-- Further IP addresses: 66.33.60.194 rDNS (76.76.21.93): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew 0 sec from localtime HTTP Age (RFC 7234) 0 Strict Transport Security 730 days=63072000 s, just this domain Public Key Pinning -- Server banner Vercel Application banner X-Powered-By: Next.js Cookie(s) (none issued at "/") Security headers X-Frame-Options: SAMEORIGIN Cache-Control: private, no-cache, no-store, max-age=0, must-revalidate Reverse Proxy banner -- Testing vulnerabilities Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK) TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK) FREAK (CVE-2015-0204) not vulnerable (OK) DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK) make sure you don't use this certificate elsewhere with SSLv2 enabled services, see https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=4EEE2BFFB5B930325D243DD39EF1172E9E945EF3BA302EEA2170866D77DB1481 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no common prime detected BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Done 2026-01-04 11:52:26 [ 120s] -->> 76.76.21.93:443 (app.writesonic.com) <<-- ----------------------------------------------------- Done testing now all IP addresses (on port 443): 66.33.60.194 76.76.21.93
About this Scan
This scan uses testssl.sh to check for:
- Protocols: SSLv2, SSLv3, TLS 1.0, TLS 1.1, TLS 1.2, TLS 1.3
- Vulnerabilities: Heartbleed, POODLE, FREAK, Logjam, DROWN, etc.
- Cipher Suites: Weak ciphers, perfect forward secrecy (PFS) support.