CVE-2018-19787: canonical ubuntu_linux
Vulnerability summary
CVE-2018-19787 is a medium (CVSS 6.1) vulnerability in canonical ubuntu_linux. EPSS estimates a 2.44% chance of exploitation in the next 30 days, higher than 84.3% of scored vulnerabilities.
Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 02-12-2018PublishedVulnerability first disclosed.
- 18-12-2025Last modifiedVulnerability information updated.
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 metrics
9 scores · 5 sources · 4 versions- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · PypiEcosystem advisory · calculated6.1MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
2.44%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.44% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- lxml< 4.2.5-1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04
Lxml1 product
- lxml< 4.2.5
Mageia1 product
- python-lxml< 4.2.5-1.mga6
PyPI1 product
- lxml< 6be1d081b49c97cfd7b3fbd934a193b668629109 | < 4.2.5
Ubuntu1 product
- lxml< 3.3.3-1ubuntu0.2 | < 3.5.0-1ubuntu0.1 | < 4.2.1-1ubuntu0.1
6 vendors · 7 products
References
19 links
lists.debian.org/debian-lts-announce/2018/12/msg00001.htmlMailing ListX Refsource MLISTThird Party AdvisoryWEB- github.com/lxml/lxml/commit/6be1d081b49c97cfd7b3fbd934a193b668629109X Refsource MISCPatchVendor AdvisoryWEBFIX
