Cross-site scripting in Roundcube

1) Cross-site scripting

EUVDB-ID: #VU82545

Risk: High

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-43770

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists in program/lib/Roundcube/rcube_string_replacer.php due to insufficient sanitization of user-supplied data passed via text/plain e-mail messages with crafted links. A remote attacker can send a specially crafted email message 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Roundcube: 1.4.0 - 1.6.2

External links

http://roundcube.net/news/2023/09/15/security-update-1.6.3-released
http://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b
http://lists.debian.org/debian-lts-announce/2023/09/msg00024.html

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.