PT-2026-76640

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS...

CVE-2026-74998: Improper Neutralization of Input During Web Page Generation

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...

PT-2026-76643

Name of the Vulnerable Software and Affected Versions Roundcube Webmail versions prior to 1.6.18 Roundcube Webmail versions 1.7.x prior to 1.7.3 Description An unclosed url in a FuncIRI attribute of an SVG image allows the evasion of remote image blocking. This flaw could potentially lead to...

CVE-2026-75010: Incorrect Resource Transfer Between Spheres

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the modoboa driver of the password plugin could leak a Modoboa API authentication token to a user-controlled host via crafted session data. This issue only affects Roundcube instances using the password plugin with its modoboa driver...

CVE-2026-75006: Server-Side Request Forgery (SSRF)

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets CSS sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. This issue exists because of insufficient fixes for...

CVE-2026-75000: Incorrect Resource Transfer Between Spheres

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper HTML/CSS sanitization of the SVG animate "by" attribute may lead to remote image blocking bypass, which in turn may lead to information disclosure or privilege escalation...

PT-2026-76647

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets CSS sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. This issue exists because of insufficient fixes for...

PT-2026-76639

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-2026-74999: Improper Neutralization of Input During Web Page Generation

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS...

CVE-2026-75007: Improper Neutralization of Special Elements used in a Command

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the LDAP search filter was subject to injection via unescaped %u/%fu/%d substitution, which may lead to information disclosure or privilege escalation...

CVE-2026-75002: Improper Neutralization of Special Elements used in a Command

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection...

CVE-2026-74997: Improper Neutralization of Special Elements used in an OS Command

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmdlearn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmdlearn driver...

PT-2026-76649

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the modoboa driver of the password plugin could leak a Modoboa API authentication token to a user-controlled host via crafted session data. This issue only affects Roundcube instances using the password plugin with its modoboa driver...

PT-2026-76646

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesieve disabled actions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin...

CVE-2026-75003: Incorrect Resource Transfer Between Spheres

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url in a FuncIRI attribute of an SVG image could evade the remote image blocking, which may lead to information disclosure or privilege escalation...

PT-2026-76638

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd learn driver...

CVE-2026-75004: Improper Neutralization of Special Elements used in a Command

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesievedisabledactions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin...

Exploit for Cross-site Scripting in Roundcube Webmail

CVE-2026-54433: Roundcube plain-text email stored XSS !Explo...

Updated roundcubemail packages fix security vulnerabilities

Add basic validation for content proxied by the css proxy Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets, Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading islocalurl check Fix remote content blocking bypass via unclosed url in a...

Roundcube -- Multiple vulnerabilities

The Roundcube project reports: Missing basic validation for content proxied by the css proxy SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading islocalurl check remote content blocking bypass...