Vulnerability intelligence
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 opening or previewing the message (zero-click).
CVSS Score
—
High
EPSS — Exploit Probability
0.3%
Riskier than 24% of all CVEs
Exploitation
Not in CISA KEV
No federal exploitation record
Remediation
unknown
Check vendor advisories
1 article across 1 outlet · first covered Jul 10, 2026 · latest Jul 10, 2026
Coverage timeline
-
Roundcube fixes zero click XSS bug CVE-2026-54433 in new updatesecurityonline.info · Jul 10, 2026