CVE-2016-9909

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CVSS 3.0

6.1 medium

EPSS

2%p81

Published

Feb 22, 2017 (Feb 22, 2017)

Modified

Jun 17, 2026

Description

The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the < (less than) character in attribute values.

Vendors: html5lib
Products: html5lib
Weakness: CWE-79
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (2.2%)

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