An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, all...

References

• advisory https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html
• advisory https://usn.ubuntu.com/3841-1/
• advisory https://usn.ubuntu.com/3841-2/
• patch https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109
• web https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html