Cross-site scripting in Roundcube Webmail - CVE-2023-43770

Vulnerability details

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.

Affected software

How to mitigate CVE-2023-43770

Links to Public Exploits and PoC-codes

• Exploit #9791 - CVE-2023-43770-POC (A Proof-Of-Concept for the CVE-2023-43770 vulnerability. ) (May 13, 2024)

External References

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

Related Security Bulletins

• Cross-site scripting in Roundcube
• cPanel update for Roundcube
• Ubuntu update for roundcube