Do Son The Roundcube security update fixes 12 webmail flaws, including a zero-click stored XSS and an SSRF bypass. Update to 1.6.19 or 1.7.4 now.
Webmail Security
A Roundcube zero-click XSS, CVE-2026-54433, lets an email run script with no click. Roundcube 1.7.2 also fixes a second stored XSS. Update now.
Roundcube v1.6.14 patches a critical pre-authentication file write flaw and account hijacking bugs. Secure your webmail server with this high-priority update.
CISA added the Zimbra XSS zero-day (CVE-2025-27915) to its KEV Catalog due to active exploitation since January. Attackers use malicious .ICS files to steal mail data.
A critical RCE flaw (CVE-2025-49113) in Roundcube is under active exploitation with PoC sold on forums. Patch immediately to v1.5.10 or v1.6.11!