Cross-site Scripting (XSS) Affecting python-lxml package, versions *
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-CENTOS7-PYTHONLXML-2020988
- published 26 Jul 2021
- disclosed 21 Mar 2021
Introduced: 21 Mar 2021
CVE-2021-28957 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 python-lxml.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-lxml package and not the python-lxml package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- https://security.netapp.com/advisory/ntap-20210521-0004/
- https://access.redhat.com/security/cve/CVE-2021-28957
- https://www.debian.org/security/2021/dsa-4880
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/
- https://bugs.launchpad.net/lxml/+bug/1888153
- https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999
- https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html
- https://access.redhat.com/errata/RHSA-2021:4151
- https://access.redhat.com/errata/RHSA-2021:4158
- https://access.redhat.com/errata/RHSA-2021:4160
- https://access.redhat.com/errata/RHSA-2021:4162
- https://security.gentoo.org/glsa/202208-06
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/