Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package lxml (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1810-LXML-614008
- published2 Dec 2018
- disclosed2 Dec 2018
Introduced: 2 Dec 2018
CVE-2018-19787 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream lxml package and not the lxml package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-19787
- https://lists.debian.org/debian-lts-announce/2018/12/msg00001.html
- https://security-tracker.debian.org/tracker/CVE-2018-19787
- https://github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109
- https://lists.debian.org/debian-lts-announce/2020/11/msg00044.html
- https://usn.ubuntu.com/3841-1/
- https://usn.ubuntu.com/3841-2/