fix: ensure safe redirect check only accepts actual domains

internal/utils/app_utils.go

@@ -2,6 +2,7 @@ package utils
 
 import (
 	"errors"
+	"fmt"
 	"net"
 	"net/url"
 	"strings"
@@ -95,7 +96,7 @@ func IsRedirectSafe(redirectURL string, domain string) bool {
 
 	hostname := parsed.Hostname()
 
-	if strings.HasSuffix(hostname, domain) {
+	if strings.HasSuffix(hostname, fmt.Sprintf(".%s", domain)) {
 		return true
 	}
 

internal/utils/app_utils_test.go

@@ -205,4 +205,9 @@ func TestIsRedirectSafe(t *testing.T) {
 	redirectURL = "http://example.org/page"
 	result = utils.IsRedirectSafe(redirectURL, domain)
 	assert.Equal(t, false, result)
+
+	// Case with malicious domain
+	redirectURL = "https://malicious-example.com/yoyo"
+	result = utils.IsRedirectSafe(redirectURL, domain)
+	assert.Equal(t, false, result)
 }