From 05373dc89ee65de8b3364912d72239cfca06b3c7 Mon Sep 17 00:00:00 2001
From: Yuki Hattori <yukihattori1116@gmail.com>
Date: Sun, 10 Sep 2023 08:30:39 +0900
Subject: [PATCH] Escape alt text when rendering into <figcaption>

---
 src/markdown/background_image/advanced.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/markdown/background_image/advanced.js b/src/markdown/background_image/advanced.js
index f14f84a..d3b44aa 100644
--- a/src/markdown/background_image/advanced.js
+++ b/src/markdown/background_image/advanced.js
@@ -185,7 +185,10 @@ function _advancedBackground(md) {
         )
         .trim()
 
-      if (figcaption) return `${open}<figcaption>${figcaption}</figcaption>`
+      if (figcaption)
+        return `${open}<figcaption>${md.utils.escapeHtml(
+          figcaption,
+        )}</figcaption>`
     }
 
     return open