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CVE-2018-19206

53
FAUCET Score

CVE-2018-19206 describes a Cross-Site Scripting (XSS) vulnerability in Roundcube versions prior to 1.3.8, specifically within the steps/mail/func.inc component. This flaw allows an attacker to inject malicious code through a specially crafted HTML email attachment, leveraging SVG and style tags to execute an onload attribute in a BODY element. Rated as Medium severity (CVSS 6.1), exploitation requires user interaction (UI:R) and could lead to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.8CPE matchmatch criteria
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
60.16%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.6016 is in the 100th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

ubuntupatch availablevia ubuntu_usn
Product: roundcube (bionic)Fixed in: 1.3.6+dfsg.1-1ubuntu0.1~esm7
ubuntupatch availablevia ubuntu_usn
Product: roundcube (xenial)Fixed in: 1.2~beta+dfsg.1-0ubuntu1+esm7

Vendor Advisories (1)

ubuntuUSN-8132-1

Roundcube Webmail vulnerabilities

Mar 30, 2026

References

github.com / roundcube/roundcubemail/releases/tag/1.3.8
Release Notes
roundcube.net / news/2018/10/26/update-1.3.8-released
Release NotesVendor Advisory
debian.org / security/2018/dsa-4344
Third Party Advisory