Red Hat: CVE-2021-28957: CVE-2021-28957 python-lxml: Missing input sanitization for formaction HTML5 attributes may lead to XSS (Multiple Advisories)
4
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
03/21/2021
11/11/2021
11/10/2021
12/15/2023
Description
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.
Solution(s)
- redhat-upgrade-babel
- redhat-upgrade-cython-debugsource
- redhat-upgrade-numpy-debugsource
- redhat-upgrade-python-cffi-debugsource
- redhat-upgrade-python-coverage-debugsource
- redhat-upgrade-python-cryptography-debugsource
- redhat-upgrade-python-lxml-debugsource
- redhat-upgrade-python-markupsafe-debugsource
- redhat-upgrade-python-nose-docs
- redhat-upgrade-python-psutil-debugsource
- redhat-upgrade-python-psycopg2-debuginfo
- redhat-upgrade-python-psycopg2-debugsource
- redhat-upgrade-python-psycopg2-doc
- redhat-upgrade-python-pymongo-debuginfo
- redhat-upgrade-python-pymongo-debugsource
- redhat-upgrade-python-sqlalchemy-doc
- redhat-upgrade-python2
- redhat-upgrade-python2-attrs
- redhat-upgrade-python2-babel
- redhat-upgrade-python2-backports
- redhat-upgrade-python2-backports-ssl_match_hostname
- redhat-upgrade-python2-bson
- redhat-upgrade-python2-bson-debuginfo
- redhat-upgrade-python2-chardet
- redhat-upgrade-python2-coverage
- redhat-upgrade-python2-coverage-debuginfo
- redhat-upgrade-python2-cython
- redhat-upgrade-python2-cython-debuginfo
- redhat-upgrade-python2-debug
- redhat-upgrade-python2-debuginfo
- redhat-upgrade-python2-debugsource
- redhat-upgrade-python2-devel
- redhat-upgrade-python2-dns
- redhat-upgrade-python2-docs
- redhat-upgrade-python2-docs-info
- redhat-upgrade-python2-docutils
- redhat-upgrade-python2-funcsigs
- redhat-upgrade-python2-idna
- redhat-upgrade-python2-ipaddress
- redhat-upgrade-python2-jinja2
- redhat-upgrade-python2-libs
- redhat-upgrade-python2-lxml
- redhat-upgrade-python2-lxml-debuginfo
- redhat-upgrade-python2-markupsafe
- redhat-upgrade-python2-mock
- redhat-upgrade-python2-nose
- redhat-upgrade-python2-numpy
- redhat-upgrade-python2-numpy-debuginfo
- redhat-upgrade-python2-numpy-doc
- redhat-upgrade-python2-numpy-f2py
- redhat-upgrade-python2-pip
- redhat-upgrade-python2-pip-wheel
- redhat-upgrade-python2-pluggy
- redhat-upgrade-python2-psycopg2
- redhat-upgrade-python2-psycopg2-debug
- redhat-upgrade-python2-psycopg2-debug-debuginfo
- redhat-upgrade-python2-psycopg2-debuginfo
- redhat-upgrade-python2-psycopg2-tests
- redhat-upgrade-python2-py
- redhat-upgrade-python2-pygments
- redhat-upgrade-python2-pymongo
- redhat-upgrade-python2-pymongo-debuginfo
- redhat-upgrade-python2-pymongo-gridfs
- redhat-upgrade-python2-pymysql
- redhat-upgrade-python2-pysocks
- redhat-upgrade-python2-pytest
- redhat-upgrade-python2-pytest-mock
- redhat-upgrade-python2-pytz
- redhat-upgrade-python2-pyyaml
- redhat-upgrade-python2-pyyaml-debuginfo
- redhat-upgrade-python2-requests
- redhat-upgrade-python2-rpm-macros
- redhat-upgrade-python2-scipy
- redhat-upgrade-python2-scipy-debuginfo
- redhat-upgrade-python2-setuptools
- redhat-upgrade-python2-setuptools-wheel
- redhat-upgrade-python2-setuptools_scm
- redhat-upgrade-python2-six
- redhat-upgrade-python2-sqlalchemy
- redhat-upgrade-python2-test
- redhat-upgrade-python2-tkinter
- redhat-upgrade-python2-tools
- redhat-upgrade-python2-urllib3
- redhat-upgrade-python2-virtualenv
- redhat-upgrade-python2-wheel
- redhat-upgrade-python2-wheel-wheel
- redhat-upgrade-python3-lxml
- redhat-upgrade-python3-lxml-debuginfo
- redhat-upgrade-python38
- redhat-upgrade-python38-asn1crypto
- redhat-upgrade-python38-atomicwrites
- redhat-upgrade-python38-attrs
- redhat-upgrade-python38-babel
- redhat-upgrade-python38-cffi
- redhat-upgrade-python38-cffi-debuginfo
- redhat-upgrade-python38-chardet
- redhat-upgrade-python38-cryptography
- redhat-upgrade-python38-cryptography-debuginfo
- redhat-upgrade-python38-cython
- redhat-upgrade-python38-cython-debuginfo
- redhat-upgrade-python38-debug
- redhat-upgrade-python38-debuginfo
- redhat-upgrade-python38-debugsource
- redhat-upgrade-python38-devel
- redhat-upgrade-python38-idle
- redhat-upgrade-python38-idna
- redhat-upgrade-python38-jinja2
- redhat-upgrade-python38-libs
- redhat-upgrade-python38-lxml
- redhat-upgrade-python38-lxml-debuginfo
- redhat-upgrade-python38-markupsafe
- redhat-upgrade-python38-markupsafe-debuginfo
- redhat-upgrade-python38-mod_wsgi
- redhat-upgrade-python38-more-itertools
- redhat-upgrade-python38-numpy
- redhat-upgrade-python38-numpy-debuginfo
- redhat-upgrade-python38-numpy-doc
- redhat-upgrade-python38-numpy-f2py
- redhat-upgrade-python38-packaging
- redhat-upgrade-python38-pip
- redhat-upgrade-python38-pip-wheel
- redhat-upgrade-python38-pluggy
- redhat-upgrade-python38-ply
- redhat-upgrade-python38-psutil
- redhat-upgrade-python38-psutil-debuginfo
- redhat-upgrade-python38-psycopg2
- redhat-upgrade-python38-psycopg2-debuginfo
- redhat-upgrade-python38-psycopg2-doc
- redhat-upgrade-python38-psycopg2-tests
- redhat-upgrade-python38-py
- redhat-upgrade-python38-pycparser
- redhat-upgrade-python38-pymysql
- redhat-upgrade-python38-pyparsing
- redhat-upgrade-python38-pysocks
- redhat-upgrade-python38-pytest
- redhat-upgrade-python38-pytz
- redhat-upgrade-python38-pyyaml
- redhat-upgrade-python38-pyyaml-debuginfo
- redhat-upgrade-python38-requests
- redhat-upgrade-python38-rpm-macros
- redhat-upgrade-python38-scipy
- redhat-upgrade-python38-scipy-debuginfo
- redhat-upgrade-python38-setuptools
- redhat-upgrade-python38-setuptools-wheel
- redhat-upgrade-python38-six
- redhat-upgrade-python38-test
- redhat-upgrade-python38-tkinter
- redhat-upgrade-python38-urllib3
- redhat-upgrade-python38-wcwidth
- redhat-upgrade-python38-wheel
- redhat-upgrade-python38-wheel-wheel
- redhat-upgrade-python39
- redhat-upgrade-python39-attrs
- redhat-upgrade-python39-cffi
- redhat-upgrade-python39-cffi-debuginfo
- redhat-upgrade-python39-chardet
- redhat-upgrade-python39-cryptography
- redhat-upgrade-python39-cryptography-debuginfo
- redhat-upgrade-python39-cython
- redhat-upgrade-python39-cython-debuginfo
- redhat-upgrade-python39-debug
- redhat-upgrade-python39-debuginfo
- redhat-upgrade-python39-debugsource
- redhat-upgrade-python39-devel
- redhat-upgrade-python39-idle
- redhat-upgrade-python39-idna
- redhat-upgrade-python39-iniconfig
- redhat-upgrade-python39-libs
- redhat-upgrade-python39-lxml
- redhat-upgrade-python39-lxml-debuginfo
- redhat-upgrade-python39-mod_wsgi
- redhat-upgrade-python39-more-itertools
- redhat-upgrade-python39-numpy
- redhat-upgrade-python39-numpy-debuginfo
- redhat-upgrade-python39-numpy-doc
- redhat-upgrade-python39-numpy-f2py
- redhat-upgrade-python39-packaging
- redhat-upgrade-python39-pip
- redhat-upgrade-python39-pip-wheel
- redhat-upgrade-python39-pluggy
- redhat-upgrade-python39-ply
- redhat-upgrade-python39-psutil
- redhat-upgrade-python39-psutil-debuginfo
- redhat-upgrade-python39-psycopg2
- redhat-upgrade-python39-psycopg2-debuginfo
- redhat-upgrade-python39-psycopg2-doc
- redhat-upgrade-python39-psycopg2-tests
- redhat-upgrade-python39-py
- redhat-upgrade-python39-pybind11
- redhat-upgrade-python39-pybind11-devel
- redhat-upgrade-python39-pycparser
- redhat-upgrade-python39-pymysql
- redhat-upgrade-python39-pyparsing
- redhat-upgrade-python39-pysocks
- redhat-upgrade-python39-pytest
- redhat-upgrade-python39-pyyaml
- redhat-upgrade-python39-pyyaml-debuginfo
- redhat-upgrade-python39-requests
- redhat-upgrade-python39-rpm-macros
- redhat-upgrade-python39-scipy
- redhat-upgrade-python39-scipy-debuginfo
- redhat-upgrade-python39-setuptools
- redhat-upgrade-python39-setuptools-wheel
- redhat-upgrade-python39-six
- redhat-upgrade-python39-test
- redhat-upgrade-python39-tkinter
- redhat-upgrade-python39-toml
- redhat-upgrade-python39-urllib3
- redhat-upgrade-python39-wcwidth
- redhat-upgrade-python39-wheel
- redhat-upgrade-python39-wheel-wheel
- redhat-upgrade-pyyaml-debugsource
- redhat-upgrade-scipy-debugsource
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