diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e943714cc95..a346349a281e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 
 ### Client
 - Enhance: モデレーションログ機能の強化
+- Plugin:register_post_form_actionを用いてCWを取得・変更できるように
 
 ### Server
 - Enhance: MasterプロセスのPIDを書き出せるように
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 2b4dcc8ed463..1f4f75d5ed40 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -819,8 +819,10 @@ function showActions(ev) {
 		action: () => {
 			action.handler({
 				text: text,
+				cw: cw,
 			}, (key, value) => {
 				if (key === 'text') { text = value; }
+				if (key === 'cw') { useCw = value !== null; cw = value; }
 			});
 		},
 	})), ev.currentTarget ?? ev.target);