Medium severity · published Dec 2, 2018
CVE-2018-19787
An issue was discovered in lxml before 4.2.5
6.1
CVSS
2.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0 · source: NVD
LX
Lxml · Lxml
before 4.2.5 · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 14.04; 16.04; 18.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19787
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19787
Patch
https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109
Mailing List
https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html
Third Party Advisory
https://usn.ubuntu.com/3841-1/
Third Party Advisory
https://usn.ubuntu.com/3841-2/
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