CooperandGoodman/yolkbook
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Harden security: CORS, XSS, rate limiting, CSP, SRI

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- Lock down CORS to ALLOWED_ORIGINS env var (was wildcard)
- Fix admin panel XSS: use data-username attributes instead of
  interpolating usernames into onclick handlers
- Add rate limiting to /api/auth/register (3r/m) and /api/admin/*
  (10r/m); set limit_req_status 429
- Add Content-Security-Policy header restricting scripts to self
  and cdn.jsdelivr.net
- Add Subresource Integrity hash to Chart.js CDN script tag

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Derek Cooper
2026-03-19 23:18:33 -07:00
parent 958c409e8e
commit f6cc7a606e
4 changed files with 57 additions and 15 deletions
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52
nginx/nginx.conf
View File

@@ -13,8 +13,11 @@ http {
gzip_types text/plain text/css application/javascript application/json;
gzip_min_length 1000;
# ── Rate limiting — login endpoint ────────────────────────────────────────
limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;
# ── Rate limiting ─────────────────────────────────────────────────────────
limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;
limit_req_zone $binary_remote_addr zone=register:10m rate=3r/m;
limit_req_zone $binary_remote_addr zone=admin:10m rate=10r/m;
limit_req_status 429;
server {
listen 80;
@@ -24,10 +27,11 @@ http {
index index.html;
# ── Security headers ──────────────────────────────────────────────────
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
add_header Content-Security-Policy "default-src 'self'; script-src 'self' https://cdn.jsdelivr.net; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self'; font-src 'self'; frame-ancestors 'none'" always;
# ── Static files ──────────────────────────────────────────────────────
location / {
@@ -45,7 +49,7 @@ http {
access_log off;
}
# ── Login rate limiting ───────────────────────────────────────────────
# ── Auth / admin rate limiting ────────────────────────────────────────
location = /api/auth/login {
limit_req zone=login burst=3 nodelay;
@@ -64,6 +68,42 @@ http {
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}
location = /api/auth/register {
limit_req zone=register burst=2 nodelay;
proxy_pass http://api:8000;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
add_header Cache-Control "no-store" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}
location /api/admin/ {
limit_req zone=admin burst=5 nodelay;
proxy_pass http://api:8000;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
add_header Cache-Control "no-store" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}
# ── API reverse proxy ─────────────────────────────────────────────────
# All /api/* requests are forwarded to the FastAPI container.
# The container is reachable by its service name on the Docker network.