diff --git a/wechat-mp.mjs b/wechat-mp.mjs
index 5a386e8..5423846 100644
--- a/wechat-mp.mjs
+++ b/wechat-mp.mjs
@@ -1198,6 +1198,7 @@ function isWechatMediaGrayUser(user, configuredUsers = []) {
     ? configuredUsers.map((value) => String(value ?? '').trim().toLowerCase()).filter(Boolean)
     : [];
   if (allowlist.length === 0) return false;
+  if (allowlist.includes('*')) return true;
   const identities = [
     user?.userId,
     user?.username,
diff --git a/wechat-mp.test.mjs b/wechat-mp.test.mjs
index bdf9693..aacc762 100644
--- a/wechat-mp.test.mjs
+++ b/wechat-mp.test.mjs
@@ -3697,7 +3697,7 @@ test('wechat mp service falls back to ASR when voice recognition is empty', asyn
   }
 });
 
-test('wechat mp service persists image and routes image url into agent prompt', async () => {
+test('wechat mp wildcard media access persists image and routes image url into agent prompt', async () => {
   const token = 'token';
   const timestamp = '1710000000';
   const nonce = 'nonce';
@@ -3719,7 +3719,7 @@ test('wechat mp service persists image and routes image url into agent prompt',
       unboundTextPrefix: '请先绑定',
       progressDelayMs: 0,
       maxImageBytes: 1024 * 1024,
-      mediaAnalysisGrayUsers: [testUserId],
+      mediaAnalysisGrayUsers: ['*'],
     },
     userAuth: {
       async findWechatUserByOpenid() {