diff --git a/packages/backend-core/src/cache/docWritethrough.ts b/packages/backend-core/src/cache/docWritethrough.ts
index 1b129bb26a..05f13a0d91 100644
--- a/packages/backend-core/src/cache/docWritethrough.ts
+++ b/packages/backend-core/src/cache/docWritethrough.ts
@@ -1,6 +1,6 @@
 import { AnyDocument, Database } from "@budibase/types"
 
-import { JobQueue, createQueue } from "../queue"
+import { JobQueue, Queue, createQueue } from "../queue"
 import * as dbUtils from "../db"
 
 interface ProcessDocMessage {
@@ -12,18 +12,26 @@ interface ProcessDocMessage {
 const PERSIST_MAX_ATTEMPTS = 100
 let processor: DocWritethroughProcessor | undefined
 
-export const docWritethroughProcessorQueue = createQueue<ProcessDocMessage>(
-  JobQueue.DOC_WRITETHROUGH_QUEUE,
-  {
-    jobOptions: {
-      attempts: PERSIST_MAX_ATTEMPTS,
-    },
-  }
-)
+export class DocWritethroughProcessor {
+  private static _queue: Queue
+
+  public static get queue() {
+    if (!DocWritethroughProcessor._queue) {
+      DocWritethroughProcessor._queue = createQueue<ProcessDocMessage>(
+        JobQueue.DOC_WRITETHROUGH_QUEUE,
+        {
+          jobOptions: {
+            attempts: PERSIST_MAX_ATTEMPTS,
+          },
+        }
+      )
+    }
+
+    return DocWritethroughProcessor._queue
+  }
 
-class DocWritethroughProcessor {
   init() {
-    docWritethroughProcessorQueue.process(async message => {
+    DocWritethroughProcessor.queue.process(async message => {
       try {
         await this.persistToDb(message.data)
       } catch (err: any) {
@@ -76,7 +84,7 @@ export class DocWritethrough {
   }
 
   async patch(data: Record<string, any>) {
-    await docWritethroughProcessorQueue.add({
+    await DocWritethroughProcessor.queue.add({
       dbName: this.db.name,
       docId: this.docId,
       data,
diff --git a/packages/backend-core/src/cache/tests/docWritethrough.spec.ts b/packages/backend-core/src/cache/tests/docWritethrough.spec.ts
index 1ae85cfd0b..b40338c408 100644
--- a/packages/backend-core/src/cache/tests/docWritethrough.spec.ts
+++ b/packages/backend-core/src/cache/tests/docWritethrough.spec.ts
@@ -6,7 +6,7 @@ import { getDB } from "../../db"
 
 import {
   DocWritethrough,
-  docWritethroughProcessorQueue,
+  DocWritethroughProcessor,
   init,
 } from "../docWritethrough"
 
@@ -15,7 +15,7 @@ import InMemoryQueue from "../../queue/inMemoryQueue"
 const initialTime = Date.now()
 
 async function waitForQueueCompletion() {
-  const queue: InMemoryQueue = docWritethroughProcessorQueue as never
+  const queue: InMemoryQueue = DocWritethroughProcessor.queue as never
   await queue.waitForCompletion()
 }
 
@@ -235,7 +235,7 @@ describe("docWritethrough", () => {
           return acc
         }, {})
       }
-      const queueMessageSpy = jest.spyOn(docWritethroughProcessorQueue, "add")
+      const queueMessageSpy = jest.spyOn(DocWritethroughProcessor.queue, "add")
 
       await config.doInTenant(async () => {
         let patches = await parallelPatch(5)
diff --git a/packages/cli/tsconfig.build.json b/packages/cli/tsconfig.build.json
index f89ad95c28..e52d886194 100644
--- a/packages/cli/tsconfig.build.json
+++ b/packages/cli/tsconfig.build.json
@@ -11,6 +11,7 @@
     "types": ["node", "jest"],
     "outDir": "dist",
     "skipLibCheck": true,
+    "baseUrl": ".",
     "paths": {
       "@budibase/types": ["../types/src"],
       "@budibase/backend-core": ["../backend-core/src"],
diff --git a/packages/server/src/api/controllers/query/index.ts b/packages/server/src/api/controllers/query/index.ts
index 3c21537484..0dba20dacd 100644
--- a/packages/server/src/api/controllers/query/index.ts
+++ b/packages/server/src/api/controllers/query/index.ts
@@ -14,22 +14,35 @@ import {
   SessionCookie,
   JsonFieldSubType,
   QueryResponse,
-  QueryPreview,
   QuerySchema,
   FieldType,
   ExecuteQueryRequest,
   ExecuteQueryResponse,
-  Row,
   QueryParameter,
   PreviewQueryRequest,
   PreviewQueryResponse,
 } from "@budibase/types"
 import { ValidQueryNameRegex, utils as JsonUtils } from "@budibase/shared-core"
+import { findHBSBlocks } from "@budibase/string-templates"
 
 const Runner = new Thread(ThreadType.QUERY, {
   timeoutMs: env.QUERY_THREAD_TIMEOUT,
 })
 
+function validateQueryInputs(parameters: Record<string, string>) {
+  for (let entry of Object.entries(parameters)) {
+    const [key, value] = entry
+    if (typeof value !== "string") {
+      continue
+    }
+    if (findHBSBlocks(value).length !== 0) {
+      throw new Error(
+        `Parameter '${key}' input contains a handlebars binding - this is not allowed.`
+      )
+    }
+  }
+}
+
 export async function fetch(ctx: UserCtx) {
   ctx.body = await sdk.queries.fetch()
 }
@@ -123,10 +136,10 @@ function getAuthConfig(ctx: UserCtx) {
 
 function enrichParameters(
   queryParameters: QueryParameter[],
-  requestParameters: { [key: string]: string } = {}
-): {
-  [key: string]: string
-} {
+  requestParameters: Record<string, string> = {}
+): Record<string, string> {
+  // first check parameters are all valid
+  validateQueryInputs(requestParameters)
   // make sure parameters are fully enriched with defaults
   for (let parameter of queryParameters) {
     if (!requestParameters[parameter.name]) {
diff --git a/packages/server/src/api/routes/tests/queries/query.seq.spec.ts b/packages/server/src/api/routes/tests/queries/query.seq.spec.ts
index 4347ed9044..fc90ad4247 100644
--- a/packages/server/src/api/routes/tests/queries/query.seq.spec.ts
+++ b/packages/server/src/api/routes/tests/queries/query.seq.spec.ts
@@ -408,6 +408,21 @@ describe("/queries", () => {
         },
       })
     })
+
+    it("shouldn't allow handlebars to be passed as parameters", async () => {
+      const res = await request
+        .post(`/api/queries/${query._id}`)
+        .send({
+          parameters: {
+            a: "{{ 'test' }}",
+          },
+        })
+        .set(config.defaultHeaders())
+        .expect(400)
+      expect(res.body.message).toEqual(
+        "Parameter 'a' input contains a handlebars binding - this is not allowed."
+      )
+    })
   })
 
   describe("variables", () => {
diff --git a/packages/types/src/api/web/query.ts b/packages/types/src/api/web/query.ts
index 3959cdea19..66f0248647 100644
--- a/packages/types/src/api/web/query.ts
+++ b/packages/types/src/api/web/query.ts
@@ -11,7 +11,7 @@ export interface PreviewQueryResponse {
 }
 
 export interface ExecuteQueryRequest {
-  parameters?: { [key: string]: string }
+  parameters?: Record<string, string>
   pagination?: any
 }