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Fencer Vulns
medium 6.1

CVE-2018-19206 json

steps/mail/func.inc in Roundcube before 1.3.8 has XSS via crafted use of <svg><style>, as demonstrated by an onload attribute in a BODY ele…

published 2018-11-12 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10915

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
55.9%
EPSS 55.9% chance of exploitation in 30 days, percentile 99%
public exploits
0
none known

Summary

steps/mail/func.inc in Roundcube before 1.3.8 has XSS via crafted use of <svg><style>, as demonstrated by an onload attribute in a BODY element, within an HTML attachment.

Patch / fix

  • roundcube webmail 1.3.8
  • roundcube Debian 14, Debian 13, Debian 12 1.3.8+dfsg.1-1

debian advisories DEBIAN-CVE-2018-19206

  • roundcube Ubuntu Pro 16.04 LTS 1.2~beta+dfsg.1-0ubuntu1+esm7
  • roundcube Ubuntu Pro 18.04 LTS 1.3.6+dfsg.1-1ubuntu0.1~esm7

ubuntu advisories UBUNTU-CVE-2018-19206

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • roundcubemail Alpine 3.10, Alpine 3.9, Alpine 3.8 1.3.8-r0

alpine advisories ALPINE-CVE-2018-19206

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

55.85% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.