verify regex before saving

Signed-off-by: Sebastian Hoß <seb@xn--ho-hia.de>
maubot · Jan 6, 2025 · 26bf846 · 26bf846
1 parent cd6c547
commit 26bf846
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/rss/bot.py b/rss/bot.py
@@ -397,6 +397,11 @@ async def set_filter(self, evt: MessageEvent, feed_id: int, title_exclude_filter
         if not sub:
             await evt.reply("This room is not subscribed to that feed")
             return
+        try:
+            re.compile(title_exclude_filter)
+        except re.error:
+            await evt.reply(f"Filter is not a valid regular expression")
+            return
         await self.dbm.update_title_filter(feed.id, evt.room_id, title_exclude_filter)
         if title_exclude_filter:
             await evt.reply(