Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS12OXY5LXhmZnEtcndyNM4AAb65

Improper Neutralization of Input During Web Page Generation in html5lib

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.

Permalink: https://github.com/advisories/GHSA-v9v9-xffq-rwr4
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12OXY5LXhmZnEtcndyNM4AAb65
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: almost 2 years ago
Updated: 8 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-v9v9-xffq-rwr4, CVE-2016-9909
References:

• https://nvd.nist.gov/vuln/detail/CVE-2016-9909
• https://github.com/html5lib/html5lib-python/issues/11
• https://github.com/html5lib/html5lib-python/issues/12
• https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7
• https://html5lib.readthedocs.io/en/latest/changes.html#b9
• http://www.openwall.com/lists/oss-security/2016/12/06/5
• http://www.openwall.com/lists/oss-security/2016/12/08/8
• https://github.com/advisories/GHSA-v9v9-xffq-rwr4
• https://github.com/pypa/advisory-database/tree/main/vulns/html5lib/PYSEC-2017-14.yaml
• https://web.archive.org/web/20161229134056/http://www.securityfocus.com/bid/95132

Repository: https://github.com/html5lib/html5lib-python
Blast Radius: 28.5

Affected Packages