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packages/app-store/zoho-bigin/api/callback.ts

@@ -11,6 +11,20 @@ import createOAuthAppCredential from "../../_utils/oauth/createOAuthAppCredentia
 import { decodeOAuthState } from "../../_utils/oauth/decodeOAuthState";
 import appConfig from "../config.json";
 
+function isAuthorizedAccountsServerUrl(accountsServer: string) {
+  // As per https://www.zoho.com/crm/developer/docs/api/v6/multi-dc.html#:~:text=US:%20https://accounts.zoho,https://accounts.zohocloud.ca&text=The%20%22location=us%22%20parameter,domain%20in%20all%20API%20endpoints.&text=You%20must%20make%20the%20authorization,.zoho.com.cn.
+  const authorizedAccountServers = [
+    "https://accounts.zoho.com",
+    "https://accounts.zoho.eu",
+    "https://accounts.zoho.in",
+    "https://accounts.zoho.com.cn",
+    "https://accounts.zoho.jp",
+    "https://accounts.zohocloud.ca",
+    "https://accounts.zoho.com.au",
+  ];
+  return authorizedAccountServers.includes(accountsServer);
+}
+
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
   const { code, "accounts-server": accountsServer } = req.query;
   const state = decodeOAuthState(req);
@@ -20,6 +34,16 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     return;
   }
 
+  if (!accountsServer || typeof accountsServer !== "string") {
+    res.status(400).json({ message: "`accounts-server` is required and must be a string" });
+    return;
+  }
+
+  if (!isAuthorizedAccountsServerUrl(accountsServer)) {
+    res.status(400).json({ message: "`accounts-server` is not authorized" });
+    return;
+  }
+
   if (!req.session?.user?.id) {
     res.status(401).json({ message: "You must be logged in to do this" });
     return;

packages/app-store/zohocrm/api/callback.ts

@@ -13,15 +13,39 @@ import appConfig from "../config.json";
 
 let client_id = "";
 let client_secret = "";
+function isAuthorizedAccountsServerUrl(accountsServer: string) {
+  // As per https://www.zoho.com/crm/developer/docs/api/v6/multi-dc.html#:~:text=US:%20https://accounts.zoho,https://accounts.zohocloud.ca&text=The%20%22location=us%22%20parameter,domain%20in%20all%20API%20endpoints.&text=You%20must%20make%20the%20authorization,.zoho.com.cn.
+  const authorizedAccountServers = [
+    "https://accounts.zoho.com",
+    "https://accounts.zoho.eu",
+    "https://accounts.zoho.in",
+    "https://accounts.zoho.com.cn",
+    "https://accounts.zoho.jp",
+    "https://accounts.zohocloud.ca",
+    "https://accounts.zoho.com.au",
+  ];
+  return authorizedAccountServers.includes(accountsServer);
+}
 
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
   const { code } = req.query;
+  const accountsServer = req.query["accounts-server"];
 
   if (code === undefined && typeof code !== "string") {
     res.status(400).json({ message: "`code` must be a string" });
     return;
   }
 
+  if (!accountsServer || typeof accountsServer !== "string") {
+    res.status(400).json({ message: "`accounts-server` is required and must be a string" });
+    return;
+  }
+
+  if (!isAuthorizedAccountsServerUrl(accountsServer)) {
+    res.status(400).json({ message: "`accounts-server` is not authorized" });
+    return;
+  }
+
   if (!req.session?.user?.id) {
     return res.status(401).json({ message: "You must be logged in to do this" });
   }
@@ -31,8 +55,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
   if (typeof appKeys.client_secret === "string") client_secret = appKeys.client_secret;
   if (!client_id) return res.status(400).json({ message: "Zoho Crm consumer key missing." });
   if (!client_secret) return res.status(400).json({ message: "Zoho Crm consumer secret missing." });
-
-  const url = `${req.query["accounts-server"]}/oauth/v2/token`;
+  const url = `${accountsServer}/oauth/v2/token`;
   const redirectUri = `${WEBAPP_URL}/api/integrations/zohocrm/callback`;
   const formData = {
     grant_type: "authorization_code",
@@ -51,7 +74,7 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
   });
   // set expiry date as offset from current time.
   zohoCrmTokenInfo.data.expiryDate = Math.round(Date.now() + 60 * 60);
-  zohoCrmTokenInfo.data.accountServer = req.query["accounts-server"];
+  zohoCrmTokenInfo.data.accountServer = accountsServer;
 
   await createOAuthAppCredential({ appId: appConfig.slug, type: appConfig.type }, zohoCrmTokenInfo.data, req);