diff --git a/packages/backend/src/controller/clientsecretCheck.ts b/packages/backend/src/controller/clientsecretCheck.ts
new file mode 100644
index 0000000..8bb01b3
--- /dev/null
+++ b/packages/backend/src/controller/clientsecretCheck.ts
@@ -0,0 +1,33 @@
+import type { SDK } from "caido:plugin";
+import type { Request } from "caido:utils";
+
+export class ClientSecretController {
+  test(req: Request): boolean {
+    const query = req.getQuery() ?? ""; /* URL에서 검사 */
+
+    const bodyRaw = req.getBody(); /* BODY 에서 검사 */
+    const body = typeof bodyRaw === "string" ? bodyRaw : Array.isArray(bodyRaw) ? bodyRaw.join("&") : "";
+
+    const authRaw = req.getHeader("authorization"); /* authz 헤더 에서 검사 */
+    const auth = typeof authRaw === "string" ? authRaw : Array.isArray(authRaw) ? authRaw.join(" ") : "";
+
+    return (
+      query.includes("client_secret=") ||
+      body.includes("client_secret=") ||
+      auth.toLowerCase().startsWith("basic Y2xpZW50X3NlY3JldA")
+    );
+  }
+
+  async report(sdk: SDK, req: Request): Promise<void> {
+    const url = req.getUrl();
+
+    await sdk.findings.create({
+      title: "Exposed client_secret",
+      description: `The request to \`${url}\` contains a potential exposure of the OAuth2 \`client_secret\`.`,
+      request: req,
+      reporter: "Client_Secret_Finder",
+      dedupeKey: "client_secret_exposure"
+    });
+  }
+}
+
diff --git a/packages/backend/src/index.ts b/packages/backend/src/index.ts
index 0165988..1d17c25 100644
--- a/packages/backend/src/index.ts
+++ b/packages/backend/src/index.ts
@@ -6,7 +6,8 @@ import { CsrfCheck } from "./controller/csrfCheck";
 import { PKCECheck } from "./controller/PKCECheck";
 import { AccessTokenLeakController } from "./controller/accessTokenDetector";
 import { ScopeDetection } from "./controller/scopeDetection";
-import { NonceCheckController } from "./controller/nonceCheck";
+// import { NonceCheckController } from "./controller/nonceCheck";
+import { ClientSecretController } from "./controller/clientsecretCheck";
 
 export type API = DefineAPI<{}>;
 
@@ -16,7 +17,8 @@ const csrfCheck = new CsrfCheck();
 const pkceCheckController = new PKCECheck();
 const tokenCheck = new AccessTokenLeakController();
 const ScopeDetectionController = new ScopeDetection();
-const nonceCheckController = new NonceCheckController();
+// const nonceCheckController = new NonceCheckController();
+const clientSecretController = new ClientSecretController();
 
 export function init(sdk: SDK<API>) {
   sdk.events.onInterceptResponse(async (sdk, req: Request, res: Response) => {
@@ -25,19 +27,26 @@ export function init(sdk: SDK<API>) {
     await tokenCheck.testReq(sdk, req);
     await tokenCheck.testResp(sdk, res, req);
     await ScopeDetectionController.scan(sdk, req.getUrl());
+    // await clientSecretController.report(sdk,req);
 
-    if (NonceCheckController.isOidcFlow(req, res)) {
-      await sdk.findings.create({
-        title: "OIDC Flow Detected",
-        description: "The request appears to be part of an OIDC flow.",
-        request: req,
-        reporter: "",
-      });
-    }
+    // if (NonceCheckController.isOidcFlow(req, res)) {
+    //   await sdk.findings.create({
+    //     title: "OIDC Flow Detected",
+    //     description: "The request appears to be part of an OIDC flow.",
+    //     request: req,
+    //     reporter: "",
+    //   });
+    // }
   });
 
-  /*
+  
   sdk.events.onInterceptRequest(async (sdk, req: Request) => {
+    if (clientSecretController.test(req)) {
+      await clientSecretController.report(sdk,req);
+    }
+  });/*
+    
+    await clientSecretController.report(sdk,req);})
     const result =
       authZCodeGrantController.testReq(req) ||
       implicitGrantController.testReq(req);