diff --git a/addons/web/static/src/views/widgets/attach_document/attach_document.js b/addons/web/static/src/views/widgets/attach_document/attach_document.js
index e28cbf06ce2..3735e850aec 100644
--- a/addons/web/static/src/views/widgets/attach_document/attach_document.js
+++ b/addons/web/static/src/views/widgets/attach_document/attach_document.js
@@ -7,17 +7,47 @@ import { standardWidgetProps } from "@web/views/widgets/standard_widget_props";
 
 import { Component } from "@odoo/owl";
 
-class AttachDocumentWidget extends Component {
+export class AttachDocumentWidget extends Component {
     setup() {
-        this.orm = useService("orm");
+        this.http = useService("http");
         this.notification = useService("notification");
+
+        this.fileInput = document.createElement("input");
+        this.fileInput.type = "file";
+        this.fileInput.accept = "*";
+        this.fileInput.multiple = true;
+        this.fileInput.onchange = this.onInputChange.bind(this);
+    }
+
+    async onInputChange() {
+        const fileData = await this.http.post(
+            "/web/binary/upload_attachment",
+            {
+                csrf_token: odoo.csrf_token,
+                ufile: [...this.fileInput.files],
+                model: this.props.record.resModel,
+                id: this.props.record.resId,
+            },
+            "text"
+        );
+        const parsedFileData = JSON.parse(fileData);
+        if (parsedFileData.error) {
+            throw new Error(parsedFileData.error);
+        }
+        await this.onFileUploaded(parsedFileData);
+    }
+
+    async triggerUpload() {
+        if (await this.beforeOpen()) {
+            this.fileInput.click();
+        }
     }
 
     async onFileUploaded(files) {
         const { action, record } = this.props;
         if (action) {
             const { model, resId, resModel } = record;
-            await this.orm.call(resModel, action, [resId], {
+            await this.env.services.orm.call(resModel, action, [resId], {
                 attachment_ids: files.map((file) => file.id),
             });
             await record.load();
diff --git a/addons/web/static/src/views/widgets/attach_document/attach_document.xml b/addons/web/static/src/views/widgets/attach_document/attach_document.xml
index c8528900425..d0fc0dac767 100644
--- a/addons/web/static/src/views/widgets/attach_document/attach_document.xml
+++ b/addons/web/static/src/views/widgets/attach_document/attach_document.xml
@@ -2,18 +2,8 @@
 <template>
 
     <t t-name="web.AttachDocument" owl="1">
-        <button t-attf-class="btn o_attachment_button #{props.highlight ? 'btn-primary' : 'btn-secondary'}">
-            <FileInput
-                onUpload.bind="onFileUploaded"
-                resId="props.record.resId || undefined"
-                resModel="props.record.resModel"
-                beforeOpen.bind="beforeOpen"
-                multiUpload="true"
-            >
-                <t t-set-slot="default">
-                    <span class="o_attach_document" t-esc="props.string"/>
-                </t>
-            </FileInput>
+        <button t-attf-class="btn o_attachment_button #{props.highlight ? 'btn-primary' : 'btn-secondary'}" t-on-click="() => this.triggerUpload()">
+            <span class="o_attach_document" t-esc="props.string"/>
         </button>
     </t>
 
diff --git a/addons/web/static/tests/mobile/views/form_view_tests.js b/addons/web/static/tests/mobile/views/form_view_tests.js
index 452f22e0a3a..d2fbc4b0b6e 100644
--- a/addons/web/static/tests/mobile/views/form_view_tests.js
+++ b/addons/web/static/tests/mobile/views/form_view_tests.js
@@ -11,6 +11,7 @@ import {
     patchWithCleanup,
 } from "@web/../tests/helpers/utils";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
+import { AttachDocumentWidget } from "@web/views/widgets/attach_document/attach_document";
 
 let fixture;
 let serverData;
@@ -430,4 +431,52 @@ QUnit.module("Mobile Views", ({ beforeEach }) => {
             assert.strictEqual(window.screenLeft, 0, "Should be 0 px from left as it is");
         }
     );
+
+    QUnit.test("attach_document widget also works inside a dropdown", async (assert) => {
+        let fileInput;
+        patchWithCleanup(AttachDocumentWidget.prototype, {
+            setup() {
+                this._super();
+                fileInput = this.fileInput;
+            },
+        });
+
+        serviceRegistry.add("http", {
+            start: () => ({
+                post: (route, params) => {
+                    assert.step("post");
+                    assert.strictEqual(route, "/web/binary/upload_attachment");
+                    assert.strictEqual(params.model, "partner");
+                    assert.strictEqual(params.id, 1);
+                    return '[{ "id": 5 }, { "id": 2 }]';
+                },
+            }),
+        });
+
+        await makeView({
+            type: "form",
+            resModel: "partner",
+            resId: 1,
+            serverData,
+            arch: `
+                <form>
+                    <header>
+                        <button string="Confirm" />
+                        <widget name="attach_document" string="Attach Document"/>
+                    </header>
+                    <sheet>
+                        <group>
+                            <button name="display_name" />
+                        </group>
+                    </sheet>
+                </form>
+            `,
+        });
+
+        await click(fixture, ".o_statusbar_buttons .dropdown-toggle");
+        await click(fixture, ".o_attach_document");
+        fileInput.dispatchEvent(new Event("change"));
+        await nextTick();
+        assert.verifySteps(["post"]);
+    });
 });
diff --git a/addons/web/static/tests/views/widgets/attach_document_tests.js b/addons/web/static/tests/views/widgets/attach_document_tests.js
index 892e8df4741..94846f4f0fa 100644
--- a/addons/web/static/tests/views/widgets/attach_document_tests.js
+++ b/addons/web/static/tests/views/widgets/attach_document_tests.js
@@ -1,8 +1,15 @@
 /** @odoo-module **/
 
-import { click, editInput, getFixture, triggerEvent } from "@web/../tests/helpers/utils";
+import {
+    click,
+    editInput,
+    getFixture,
+    nextTick,
+    patchWithCleanup,
+} from "@web/../tests/helpers/utils";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
 import { registry } from "@web/core/registry";
+import { AttachDocumentWidget } from "@web/views/widgets/attach_document/attach_document";
 
 const serviceRegistry = registry.category("services");
 
@@ -35,6 +42,14 @@ QUnit.module("Widgets", (hooks) => {
     QUnit.module("AttachDocument");
 
     QUnit.test("attach document widget calls action with attachment ids", async function (assert) {
+        let fileInput;
+        patchWithCleanup(AttachDocumentWidget.prototype, {
+            setup() {
+                this._super();
+                fileInput = this.fileInput;
+            },
+        });
+
         serviceRegistry.add("http", {
             start: () => ({
                 post: (route, params) => {
@@ -77,19 +92,22 @@ QUnit.module("Widgets", (hooks) => {
 
         await editInput(target, "[name='display_name'] input", "yop");
         await click(target, ".o_attach_document");
-        await triggerEvent(
-            target,
-            ".o_file_input input",
-            "change",
-            {},
-            { skipVisibilityCheck: true }
-        );
+        fileInput.dispatchEvent(new Event("change"));
+        await nextTick();
         assert.verifySteps(["write", "read", "post", "my_action", "read"]);
     });
 
     QUnit.test(
         "attach document widget calls action with attachment ids on a new record",
         async function (assert) {
+            let fileInput;
+            patchWithCleanup(AttachDocumentWidget.prototype, {
+                setup() {
+                    this._super();
+                    fileInput = this.fileInput;
+                },
+            });
+
             serviceRegistry.add("http", {
                 start: () => ({
                     post: (route, params) => {
@@ -131,13 +149,8 @@ QUnit.module("Widgets", (hooks) => {
 
             await editInput(target, "[name='display_name'] input", "yop");
             await click(target, ".o_attach_document");
-            await triggerEvent(
-                target,
-                ".o_file_input input",
-                "change",
-                {},
-                { skipVisibilityCheck: true }
-            );
+            fileInput.dispatchEvent(new Event("change"));
+            await nextTick();
             assert.verifySteps(["create", "read", "post", "my_action", "read"]);
         }
     );