add rate limit to all email-sending endpoints

backend/src/server/config/rateLimiter.ts

@@ -104,6 +104,14 @@ export const publicSshCaLimit: RateLimitOptions = {
 export const invalidateCacheLimit: RateLimitOptions = {
   timeWindow: 60 * 1000,
   hook: "preValidation",
-  max: 1,
+  max: 2,
+  keyGenerator: (req) => req.realIp
+};
+
+// Makes spamming "request access" harder, preventing email DDoS
+export const requestAccessLimit: RateLimitOptions = {
+  timeWindow: 60 * 1000,
+  hook: "preValidation",
+  max: 10,
   keyGenerator: (req) => req.realIp
 };

backend/src/server/routes/v1/org-admin-router.ts

@@ -2,7 +2,7 @@ import { z } from "zod";
 
 import { ProjectMembershipsSchema } from "@app/db/schemas";
 import { EventType } from "@app/ee/services/audit-log/audit-log-types";
-import { readLimit } from "@app/server/config/rateLimiter";
+import { readLimit, writeLimit } from "@app/server/config/rateLimiter";
 import { verifyAuth } from "@app/server/plugins/auth/verify-auth";
 import { AuthMode } from "@app/services/auth/auth-type";
 
@@ -47,7 +47,7 @@ export const registerOrgAdminRouter = async (server: FastifyZodProvider) => {
     method: "POST",
     url: "/projects/:projectId/grant-admin-access",
     config: {
-      rateLimit: readLimit
+      rateLimit: writeLimit
     },
     schema: {
       params: z.object({

backend/src/server/routes/v1/project-router.ts

@@ -19,7 +19,7 @@ import { EventType } from "@app/ee/services/audit-log/audit-log-types";
 import { ApiDocsTags, PROJECTS } from "@app/lib/api-docs";
 import { CharacterType, characterValidator } from "@app/lib/validator/validate-string";
 import { re2Validator } from "@app/lib/zod";
-import { readLimit, writeLimit } from "@app/server/config/rateLimiter";
+import { readLimit, requestAccessLimit, writeLimit } from "@app/server/config/rateLimiter";
 import { verifyAuth } from "@app/server/plugins/auth/verify-auth";
 import { ActorType, AuthMode } from "@app/services/auth/auth-type";
 import { validateMicrosoftTeamsChannelsSchema } from "@app/services/microsoft-teams/microsoft-teams-fns";
@@ -1006,7 +1006,7 @@ export const registerProjectRouter = async (server: FastifyZodProvider) => {
     method: "POST",
     url: "/:workspaceId/project-access",
     config: {
-      rateLimit: writeLimit
+      rateLimit: requestAccessLimit
     },
     schema: {
       params: z.object({