CVE-2016-9910

MEDIUM

Html5lib < 0.99999999 - XSS

Title source: rule

Description

The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of special characters in attribute values, a different vulnerability than CVE-2016-9909.

References (7)

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/12/06/5

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/12/08/8

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/95132

[Patch] https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7

View Patch ZIP pw:eip

[Vendor Advisory] https://github.com/html5lib/html5lib-python/issues/11

[Vendor Advisory] https://github.com/html5lib/html5lib-python/issues/12

[Release Notes] https://html5lib.readthedocs.io/en/latest/changes.html#b9

Scores

CVSS v3 6.1

EPSS 0.0049

EPSS Percentile 65.4%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Classification

CWE

CWE-79

Status published

Affected Products (3)

html5lib/html5lib < 0.99999999

pypi/html5lib < 0.99999999PyPI

n/a/n/a

Timeline

Published Feb 22, 2017

Tracked Since Feb 18, 2026