Roundcube Webmail 1.6.x < 1.6.18 / 1.7.x < 1.7.3 Multiple Vulnerabilities

The remote web server is running Roundcube Webmail version 1.6.x prior to 1.6.18 or 1.7.x prior to 1.7.3. It is, therefore, affected by multiple vulnerabilities: - The cmdlearn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This iss...

CVE-2026-74998

A flaw was found in Roundcube Webmail. Responses from the Cascading Style Sheets CSS proxy were not properly validated. This could allow a remote attacker to exploit MIME sniffing vulnerabilities, resulting in information disclosure or Cross-Site Scripting XSS...

Linux Distros Unpatched Vulnerability : CVE-2026-74998

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in informati...

CVE-2026-74998

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in information disclosure or XSS cross-site scripting via MIME sniffing...

CVE-2026-74998

Roundcube Webmail versions before 1.6.18 and 1.7.x before 1.7.3 fail to validate CSS proxy responses, enabling XSS or information disclosure through MIME sniffing. CVSS 7.2 (HIGH), network-reachable with no privileges. No in-the-wild exploitation reported. Fix: upgrade to 1.6.18 or 1.7.3 (commits...

CVE-2026-74998

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in information disclosure or XSS cross-site scripting via MIME sniffing...

CVE-2026-74998

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in information disclosure or XSS cross-site scripting via MIME sniffing...

CVE-2026-74998

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in information disclosure or XSS cross-site scripting via MIME sniffing...

EUVD-2026-60165

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS Cascading Style Sheets proxy were not validated, which may result in information disclosure or XSS cross-site scripting via MIME sniffing...