CVE-2026-54433

EUVD-2026-43732
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).
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
7.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
roundcubewebmail
1.6.0 ≤
𝑥
< 1.6.17
CNA
roundcubewebmail
1.7.0 ≤
𝑥
< 1.7.2
CNA
Debian logo
Debian Releases
Debian Product
Codename
roundcube
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
1.6.17+dfsg-1
fixed
sid
1.6.17+dfsg-1
fixed
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2