#VU82083 Cross-site scripting in Roundcube - CVE-2023-5631
Vulnerability identifier: #VU82083
Vulnerability risk: High
CVSSv4.0: 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/E:A/U:Amber]
CVE-ID: CVE-2023-5631
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Roundcube
Web applications /
Webmail solutions
Vendor: Roundcube
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when processing SVG files in program/lib/Roundcube/rcube_washtml.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.
Note, the vulnerability is being actively exploited in the wild.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Roundcube: 1.0.0 - 1.0.12, 1.1.0 - 1.1.12, 1.2.0 - 1.2.13, 1.3.0 - 1.3.17, 1.4.0 - 1.4.14, 1.5.0 - 1.5.4, 1.6.0 - 1.6.3
External links
https://github.com/roundcube/roundcubemail/releases/tag/1.6.4
https://github.com/roundcube/roundcubemail/releases/tag/1.5.5
https://github.com/roundcube/roundcubemail/releases/tag/1.4.15
https://www.welivesecurity.com/en/eset-research/winter-vivern-exploits-zero-day-vulnerability-roundcube-webmail-servers/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
