Cross-site scripting in Roundcube Webmail - CVE-2020-13964
Published: June 11, 2020
Vulnerability identifier: #VU28978
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2020-13964
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via the username template object.
The vulnerability exists due to insufficient sanitization of user-supplied data passed via the "username" template object in "include/rcmail_output_html.php". A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Roundcube Webmail
roundcube (Debian package)
roundcubemail
Fedora
roundcube (Debian package)
roundcubemail
Fedora
How to mitigate CVE-2020-13964
Install update from vendor's website.
Roundcube Webmail - addressed in versions 1.3.12, 1.4.5
roundcube (Debian package) - addressed in versions 1.2.3+dfsg.1-4+deb9u5, 1.3.13+dfsg.1-1~deb10u1
roundcubemail - addressed in versions 1.4.6-1.fc31, 1.4.6-1.fc32
roundcube (Debian package) - addressed in versions 1.2.3+dfsg.1-4+deb9u5, 1.3.13+dfsg.1-1~deb10u1
roundcubemail - addressed in versions 1.4.6-1.fc31, 1.4.6-1.fc32