diff --git a/res/forum/api/update_user.php b/res/forum/api/update_user.php
new file mode 100644
index 0000000..a6f3d7f
--- /dev/null
+++ b/res/forum/api/update_user.php
@@ -0,0 +1,23 @@
+<?php
+
+include("../../global.php");
+session_start();
+
+if (!isset($_SESSION["username"])) goto fail;
+
+$out = $database -> query("SELECT username, admin, user_info FROM user WHERE BINARY username=\"" . $_SESSION["username"] . "\" AND admin=\"1\"");
+
+if (!isset($_GET["old_username"])) return;
+
+if ($out -> num_rows != 1 && $_GET["old_username"] != $_SESSION["username"])
+{
+    fail:
+    echo "nope";
+    header("Location: ../../../index.php");
+    return;
+}
+
+$user_info_id = (($database -> query("SELECT user_info FROM user WHERE username=\"" . $_GET["old_username"] . "\"")) -> fetch_assoc())["user_info"];
+
+$database -> query("UPDATE user SET username=\"" . $_GET["username"] . "\", admin=" . $_GET["admin"] . " WHERE user_info=" . $user_info_id);
+$database -> query("UPDATE user_info SET sex=" . $_GET["sex"] . ", bio=\"" . $_GET["bio"] . "\", nickname=\"" . $_GET["nickname"] . "\" WHERE id=" . $user_info_id);
\ No newline at end of file