CVE-2026-54433
High
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).
SeverityHigh
CVSS7.2
Exploit probability—
Product
Roundcube Webmail
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- roundcube webmail1.6.17, 1.7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| roundcube webmail | v < 1.6.17, 1.7.0 ≤ v < 1.7.2 | 1.6.17, 1.7.2 |
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