CVE-2026-54433

Stored XSS via crafted plain-text email in Roundcube Webmail

Published Jul 14, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4693-1 roundcube security update
Debian DSA Debian DSA DSA-6391-1 roundcube security update
History
Type Values Removed Values Added
Title Stored XSS via crafted plain-text email in Roundcube Webmail
Type Values Removed Values Added
Title Roundcube Webmail Stored XSS via Plain-Text Email
Type Values Removed Values Added
Title Roundcube Webmail Stored XSS via Plain-Text Email
Type Values Removed Values Added
Title Stored XSS via crafted plain-text email leads to zero-click JavaScript execution in authenticated Roundcube Webmail
Type Values Removed Values Added
Title Stored XSS via crafted plain-text email leads to zero-click JavaScript execution in authenticated Roundcube Webmail
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).
First Time appeared Roundcube
Roundcube webmail
Weaknesses CWE-79
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Vendors & Products Roundcube
Roundcube webmail
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 15, 2026, 2:10 PM
Reserved
Jun 15, 2026, 1:29 PM
Status
Analyzed
Published
Jul 14, 2026, 5:17 PM
Modified
Oct 24, 2026, 9:10 PM