www.cutter.re has GitHub.io certificate, resulting in 'insecure webpage' when visiting https://www.cutter.re

[JensTimmerman]

When visiting www.cutter.re I'm presented with a GitHub.io ssl certificate

wget https://www.cutter.re
--2025-03-02 12:38:38--  https://www.cutter.re/
Resolving www.cutter.re (www.cutter.re)... 185.199.110.153, 185.199.108.153, 185.199.109.153, ...
Connecting to www.cutter.re (www.cutter.re)|185.199.110.153|:443... connected.
ERROR: no certificate subject alternative

curl  https://www.cutter.re -v
* Host www.cutter.re:443 was resolved.
* IPv6: (none)
* IPv4: 185.199.110.153, 185.199.108.153, 185.199.109.153, 185.199.111.153
*   Trying 185.199.110.153:443...
* Connected to www.cutter.re (185.199.110.153) port 443
* ALPN: curl offers h2,http/1.1
* (304) (OUT), TLS handshake, Client hello (1):
*  CAfile: /etc/ssl/cert.pem
*  CApath: none
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 / [blank] / UNDEF
* ALPN: server accepted h2
* Server certificate:
*  subject: C=US; ST=California; L=San Francisco; O=GitHub, Inc.; CN=*.github.io
*  start date: Mar 15 00:00:00 2024 GMT
*  expire date: Mar 14 23:59:59 2025 GMT
*  subjectAltName does not match host name www.cutter.re
* SSL: no alternative certificate subject name matches target host name 'www.cutter.re'
* Closing connection
curl: (60) SSL: no alternative certificate subject name matches target host name 'www.cutter.re'
More details here: https://curl.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.

you probably don't encounter this issue in a browser if you previously trusted the GitHub.io certificate once, the page does redirect you to cutter.io with a 301 Moved permanently

I encountered this when visiting links on the web that still point to www.cutter.re

[karliss]

Do you have any examples of such links still pointing to www.cutter.re ?