From 5c35dc866c7802716ce2f9da61e5fa7235392821 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Thu, 12 Feb 2026 14:18:19 -0500
Subject: [PATCH] feat: introduce new topics:crosspost privilege

---
 .../en-GB/admin/manage/privileges.json         |  1 +
 src/categories/create.js                       |  1 +
 src/privileges/categories.js                   |  1 +
 src/upgrades/4.9.0/crosspost_privilege.js      | 18 ++++++++++++++++++
 4 files changed, 21 insertions(+)
 create mode 100644 src/upgrades/4.9.0/crosspost_privilege.js

diff --git a/public/language/en-GB/admin/manage/privileges.json b/public/language/en-GB/admin/manage/privileges.json
index 240cff6aa5..bb4b33494f 100644
--- a/public/language/en-GB/admin/manage/privileges.json
+++ b/public/language/en-GB/admin/manage/privileges.json
@@ -29,6 +29,7 @@
 	"access-topics": "Access Topics",
 	"create-topics": "Create Topics",
 	"reply-to-topics": "Reply to Topics",
+	"crosspost-topics": "Cross-post Topics",
 	"schedule-topics": "Schedule Topics",
 	"tag-topics": "Tag Topics",
 	"edit-posts": "Edit Posts",
diff --git a/src/categories/create.js b/src/categories/create.js
index d9d59dac59..92f63f27e6 100644
--- a/src/categories/create.js
+++ b/src/categories/create.js
@@ -59,6 +59,7 @@ module.exports = function (Categories) {
 			'groups:topics:read',
 			'groups:topics:create',
 			'groups:topics:reply',
+			'groups:topics:crosspost',
 			'groups:topics:tag',
 			'groups:posts:edit',
 			'groups:posts:history',
diff --git a/src/privileges/categories.js b/src/privileges/categories.js
index 0e48b37c90..61fda1317a 100644
--- a/src/privileges/categories.js
+++ b/src/privileges/categories.js
@@ -23,6 +23,7 @@ const _privilegeMap = new Map([
 	['topics:read', { label: '[[admin/manage/privileges:access-topics]]', type: 'viewing' }],
 	['topics:create', { label: '[[admin/manage/privileges:create-topics]]', type: 'posting' }],
 	['topics:reply', { label: '[[admin/manage/privileges:reply-to-topics]]', type: 'posting' }],
+	['topics:crosspost', { label: '[[admin/manage/privileges:crosspost-topics]]', type: 'posting' }],
 	['topics:schedule', { label: '[[admin/manage/privileges:schedule-topics]]', type: 'posting' }],
 	['topics:tag', { label: '[[admin/manage/privileges:tag-topics]]', type: 'posting' }],
 	['posts:edit', { label: '[[admin/manage/privileges:edit-posts]]', type: 'posting' }],
diff --git a/src/upgrades/4.9.0/crosspost_privilege.js b/src/upgrades/4.9.0/crosspost_privilege.js
new file mode 100644
index 0000000000..5cd55e997b
--- /dev/null
+++ b/src/upgrades/4.9.0/crosspost_privilege.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const privileges = require('../../privileges');
+const db = require('../../database');
+
+module.exports = {
+	name: 'Give topic:crosspost privilege to registered-users on all categories',
+	timestamp: Date.UTC(2026, 1, 12),
+	method: async () => {
+		const cids = await db.getSortedSetMembers('categories:cid');
+		await Promise.all(cids.map(async (cid) => {
+			const can = await privileges.categories.can('topics:create', cid, 'registered-users');
+			if (can) {
+				await privileges.categories.give(['groups:topics:crosspost'], cid, 'registered-users');
+			}
+		}));
+	},
+};