Cross-Site Scripting Vulnerability in Roundcube Webmail
CVE-2020-35730

6.1MEDIUM

Key Information:

Vendor: Roundcube
Status: Webmail
Vendor: CVE Published:; 28 December 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 58%🦅 CISA Reported

Summary

A Cross-Site Scripting (XSS) vulnerability exists in Roundcube Webmail prior to version 1.2.13, 1.3.16, and 1.4.10. This flaw allows attackers to exploit the application by sending a specially crafted plain text email containing JavaScript code. The vulnerability arises from improper handling of link references in the rcube_string_replacer.php file, which can lead to arbitrary script execution in the context of the user's session. It is crucial for users to upgrade to a secure version to mitigate potential risks.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-44026-PoC
Created by skyllpro