What is CVE-2026-54433?

CVE-2026-54433 is a high-severity vulnerability in Roundcube Webmail, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-07-14.

How severe is CVE-2026-54433?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Roundcube Webmail

CVE-2026-54433

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 o…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Roundcube Webmail — versions 1.6.0, 1.7.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-54433?: CVE-2026-54433 is a high-severity vulnerability in Roundcube Webmail, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-07-14.
How severe is CVE-2026-54433?: High severity. CVSS v3 base score is 7.2 out of 10.