I think I found the culprit.
Indeed, it came from the Nginx vhost configuration.
My vhost came from the official doc:
https://docs.nextcloud.com/server/latest/admin_manual/installation/nginx.html#nextcloud-in-the-webroot-of-nginx
After some tests, I found that this block was the problem:
location / {
try_files $uri $uri/ /index.php$request_uri;
}
With that block, I can use Nc, but can’t delete group or user.
If I change it to
location / {
try_files $uri /index.php$uri;
}
Now, I can delete groups and users, but all the app pages (/apps/files, /apps/photos, /apps/…) are now receiving an Error 403.
If I add this block to my vhost:
location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
try_files $uri/ =404;
index index.php index.html;
}
I can now delete groups and users, all the apps pages are working, but I can’t logout from Nc:
Unauthorized access
CSRF check failed
Tbh, I just played with the oc[ms]-provider block as it was referenced earlier in this post, but I have no clue why adding this block fixes one problem and bring a new one.
Anyone got an idea on this?
My Vhost:
# HTTP response headers borrowed from Nextcloud `.htaccess`
add_header Referrer-Policy "no-referrer" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Download-Options "noopen" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Permitted-Cross-Domain-Policies "none" always;
add_header X-Robots-Tag "none" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
# Remove X-Powered-By, which is an information leak
fastcgi_hide_header X-Powered-By;
index index.php index.html index.php$request_uri;
access_log /var/log/nginx/access.log ndd_inclus;
error_log /var/log/nginx/error.log;
# Rule borrowed from `.htaccess` to handle Microsoft DAV clients
location = / {
if ( $http_user_agent ~ ^DavClnt ) {
return 302 $scheme://$host/remote.php/webdav/$is_args$args;
}
}
location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}
location ^~ /.well-known {
fastcgi_param SERVER_PORT 443;
# The rules in this block are an adaptation of the rules
# in `.htaccess` that concern `/.well-known`.
location = /.well-known/carddav { return 301 /remote.php/dav/; }
location = /.well-known/caldav { return 301 /remote.php/dav/; }
location = /.well-known/webfinger { return 301 $scheme://$host/index.php/.well-known/webfinger; }
location = /.well-known/nodeinfo { return 301 $scheme://$host/index.php/.well-known/nodeinfo; }
location /.well-known/acme-challenge { try_files $uri $uri/ =404; }
location /.well-known/pki-validation { try_files $uri $uri/ =404; }
# The following 2 rules are only needed for the user_webfinger app.
# Uncomment it if you're planning to use this app.
rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
# The following rule is only needed for the Social app.
# Uncomment it if you're planning to use this app.
rewrite ^/.well-known/webfinger /public.php?service=webfinger last;
# Let Nextcloud's API for `/.well-known` URIs handle all other
# requests by passing them to the front-end controller.
return 301 /index.php$request_uri;
}
location = /data/htaccesstest.txt {
allow all;
log_not_found off;
access_log off;
}
# Rules borrowed from `.htaccess` to hide certain paths from clients
location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/) { return 404; }
location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) { return 404; }
location ~ \.php(?:$|/) {
# Added here a second time if not NC was complaining to not have it.
add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
rewrite ^/(?!index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy) /index.php$request_uri;
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
set $path_info $fastcgi_path_info;
try_files $fastcgi_script_name =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $path_info;
fastcgi_param HTTPS on;
# Next line needed to be commented out if not NC didn't receive headers.
# fastcgi_param modHeadersAvailable true; # Avoid sending the security headers twice
fastcgi_param front_controller_active true; # Enable pretty urls
fastcgi_pass php-fpm7.4;
fastcgi_intercept_errors on;
fastcgi_request_buffering off;
}
location ~ \.(?:css|js|svg|gif|png|jpg|ico|wasm|tflite)$ {
try_files $uri /index.php$request_uri;
expires 6M; # Cache-Control policy borrowed from `.htaccess`
access_log off; # Optional: Don't log access to assets
location ~ \.wasm$ {
default_type application/wasm;
}
}
location ~ \.woff2?$ {
try_files $uri /index.php$request_uri;
expires 7d; # Cache-Control policy borrowed from `.htaccess`
access_log off; # Optional: Don't log access to assets
}
location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
try_files $uri/ =404;
index index.php index.html;
}
# Rule borrowed from `.htaccess`
location /remote {
return 301 /remote.php$request_uri;
}
location / {
try_files $uri /index.php$uri;
}
