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An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.

🗓️ 30 Jul 2021 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 1 Views

There is an XSS flaw in Python lxml Cleaner before four point six three when safe attributes and forms are disabled.

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16 Dec 2021 08:00Current
7High risk
Vulners AI Score7
CVSS 24.3
CVSS 3.16.1
EPSS0.00518
SSVC
1