From 4bc7873e037dd4760c32e3dda4a94462696684e6 Mon Sep 17 00:00:00 2001
From: HJ <30-hj@users.noreply.git.pleroma.social>
Date: Mon, 5 Jun 2023 19:04:30 +0000
Subject: [PATCH] Merge branch 'harden-parser' into 'develop'

fix regex misinterpreting tag name in badly formed HTML

See merge request pleroma/pleroma-fe!1835

(cherry picked from commit 624af7ed00b0edb2792f84cc83f6eeb7568798c4)

00b47e16 fix regex misinterpreting tag name in badly formed HTML, prevent rich
5e656cc0 Merge remote-tracking branch 'origin/develop' into harden-parser
10e28f6c changelog
0109724a case insensititvy
---
 changelog.d/parser.fix                         | 1 +
 src/components/rich_content/rich_content.jsx   | 4 +++-
 src/services/html_converter/utility.service.js | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 changelog.d/parser.fix

diff --git a/changelog.d/parser.fix b/changelog.d/parser.fix
new file mode 100644
index 0000000000..13bac0bf6e
--- /dev/null
+++ b/changelog.d/parser.fix
@@ -0,0 +1 @@
+fix regex issue in HTML parser/renderer
diff --git a/src/components/rich_content/rich_content.jsx b/src/components/rich_content/rich_content.jsx
index 7881e365cc..b16ab242e2 100644
--- a/src/components/rich_content/rich_content.jsx
+++ b/src/components/rich_content/rich_content.jsx
@@ -149,7 +149,9 @@ export default {
       // Handle tag nodes
       if (Array.isArray(item)) {
         const [opener, children, closer] = item
-        const Tag = getTagName(opener)
+        let Tag = getTagName(opener)
+        if (Tag.toLowerCase() === 'script') Tag = 'js-exploit'
+        if (Tag.toLowerCase() === 'style') Tag = 'css-exploit'
         const fullAttrs = getAttrs(opener, () => true)
         const attrs = getAttrs(opener)
         const previouslyMentions = currentMentions !== null
diff --git a/src/services/html_converter/utility.service.js b/src/services/html_converter/utility.service.js
index f104297183..a130135374 100644
--- a/src/services/html_converter/utility.service.js
+++ b/src/services/html_converter/utility.service.js
@@ -5,7 +5,7 @@
  * @return {String} - tagname, i.e. "div"
  */
 export const getTagName = (tag) => {
-  const result = /(?:<\/(\w+)>|<(\w+)\s?.*?\/?>)/gi.exec(tag)
+  const result = /(?:<\/(\w+)>|<(\w+)\s?.*?\/?>)/gis.exec(tag)
   return result && (result[1] || result[2])
 }