What’s Vulnerable › Vulnerabilities
CVE-2026-54433
- Severity: critical (CVSS 10.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-14 · updated 2026-10-24
- Weakness: CWE-79
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).
Affected products
- Roundcube Webmail: before 1.6.17; from 1.7.0 before 1.7.2 — fixed in 1.6.17, 1.7.2
How to fix
Upgrade to a fixed version: Roundcube Webmail 1.6.17, 1.7.2. Check the vendor advisory for mitigations.
References
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