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Improper Neutralization of Input During Web Page Generation in html5lib

Moderate severity GitHub Reviewed Published May 17, 2022 to the GitHub Advisory Database • Updated Aug 31, 2023

Package

pip html5lib (pip)

Affected versions

< 0.999999999

Patched versions

0.999999999

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.

References

Published by the National Vulnerability Database Feb 22, 2017
Published to the GitHub Advisory Database May 17, 2022
Reviewed Jul 6, 2022
Last updated Aug 31, 2023

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

CVE-2016-9909

GHSA ID

GHSA-v9v9-xffq-rwr4

Source code

No known source code
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