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Debian Security Advisory DSA-5043-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
January 12, 2022                      https://www.debian.org/security/faq
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Package        : lxml
CVE ID         : CVE-2021-43818
Debian Bug     : 1001885

It was discovered that lxml, a Python binding for the libxml2 and
libxslt libraries, does not properly sanitize its input, which could
lead to cross-site scripting.

For the oldstable distribution (buster), this problem has been fixed
in version 4.3.2-1+deb10u4.

For the stable distribution (bullseye), this problem has been fixed in
version 4.6.3+dfsg-0.1+deb11u1.

We recommend that you upgrade your lxml packages.

For the detailed security status of lxml please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/lxml

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org