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Fix filter bypass leading to XSS (#362) #434

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Merged
nicholasserra merged 1 commit into from
Jul 17, 2022
Merged

Fix filter bypass leading to XSS (#362) #434

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2 changes: 1 addition & 1 deletion lib/markdown2.py
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Expand Up @@ -2249,7 +2249,7 @@ def _encode_amps_and_angles(self, text):
text = self._naked_gt_re.sub('>', text)
return text

_incomplete_tags_re = re.compile(r"<(/?\w+?(?!\w).+?[\s/]+?)")
_incomplete_tags_re = re.compile(r"<(/?\w+?(?!\w)\s*?.+?[\s/]+?)")

def _encode_incomplete_tags(self, text):
if self.safe_mode not in ("replace", "escape"):
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2 changes: 2 additions & 0 deletions test/tm-cases/xss_issue_362.html
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@@ -0,0 +1,2 @@
<p>&lt;iframe
onload=alert()//</p>
1 change: 1 addition & 0 deletions test/tm-cases/xss_issue_362.opts
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@@ -0,0 +1 @@
{"safe_mode": True}
2 changes: 2 additions & 0 deletions test/tm-cases/xss_issue_362.text
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@@ -0,0 +1,2 @@
<iframe
onload=alert()//