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[markdown] Escape HTML characters before running Markdown::toBBCode()

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- This prevents HTML tag looking text to be purified in the Markdown to BBCode process
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Hypolite Petovan
2021-10-14 02:11:53 -04:00
parent 31635cf6c3
commit 43b0b5a0e4
1 changed files with 4 additions and 0 deletions
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markdown/markdown.php
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@@ -56,6 +56,10 @@ function markdown_post_local_start(App $a, &$request) {
// Escape mentions which username can contain Markdown-like characters // Escape mentions which username can contain Markdown-like characters
// See https://github.com/friendica/friendica/issues/9486 // See https://github.com/friendica/friendica/issues/9486
return \Friendica\Util\Strings::performWithEscapedBlocks($body, '/[@!][^@\s]+@[^\s]+\w/', function ($text) { return \Friendica\Util\Strings::performWithEscapedBlocks($body, '/[@!][^@\s]+@[^\s]+\w/', function ($text) {
// Markdown accepts literal HTML but we do not in post body, so we need to escape all chevrons
// See https://github.com/friendica/friendica/issues/10634
$text = \Friendica\Util\Strings::escapeHtml($text);
return Markdown::toBBCode($text); return Markdown::toBBCode($text);
}); });
} }