CVE-2018-19787
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, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet…
Does this matter?
Lower severity and a low EPSS score (2.44%). Track it; it rarely justifies an emergency change on its own.
Description
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, allowing a remote attacker to conduct XSS attacks, as demonstrated by "j a v a s c r i p t:" in Internet Explorer. This is a similar issue to CVE-2014-3146.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.44% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- lxml/lxml · debian/debian linux · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html
- https://usn.ubuntu.com/3841-1/Third Party Advisory
- https://usn.ubuntu.com/3841-2/Third Party Advisory
- https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html
- https://usn.ubuntu.com/3841-1/Third Party Advisory
- https://usn.ubuntu.com/3841-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.