What is CVE-2019-15237?

CVE-2019-15237 is a high-severity vulnerability in Roundcube Webmail. CVSS score: 7.4/10. Published 2019-08-20.

How severe is CVE-2019-15237?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Roundcube Webmail

CVE-2019-15237

Roundcube Webmail through 1.3.9 mishandles Punycode xn-- domain names, leading to homograph attacks.

Published 2019-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000

Affected products

Roundcube Webmail
Fedoraproject Fedora — versions 29

References

github.com/roundcube/roundcubemail/issues/6891 (Third Party Advisory, Issue Tracking)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2019-15237?: CVE-2019-15237 is a high-severity vulnerability in Roundcube Webmail. CVSS score: 7.4/10. Published 2019-08-20.
How severe is CVE-2019-15237?: High severity. CVSS v3 base score is 7.4 out of 10.