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    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).

    Published:Jul 14, 2026
    Last Modified:Jul 31, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00312
    CVSS Score:7.2

    Affected Products

    Vendor
    Roundcube
    Product
    Webmail

    Exploits

    https://github.com/aramosf/CVE-2026-54433

    Related CVEs

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    CVE-2026-75002 (CVSS 7.1) — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronizati…
    CVE-2026-75000 (CVSS 5.8) — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper HTML/CSS sanitization of the SVG animate "…
    CVE-2026-74999 (CVSS 5.4) — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to sto…
    CVE-2026-74998 (CVSS 7.2) — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) pro…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High