Information Disclosure in Roundcube Webmail HTML Style Sanitizer

Compliance Impact

The provided resources do not specify how the CVE-2025-68460 vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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Executive Summary

CVE-2025-68460 is an information disclosure vulnerability in the HTML style sanitizer of Roundcube Webmail versions before 1.5.12 and 1.6 before 1.6.12. The issue arises because the sanitizer improperly handles CSS styles, allowing malformed or malicious CSS content to be processed or rendered, which can lead to leakage of sensitive information. The vulnerability was fixed by updating the sanitizer to detect and ignore suspicious CSS content, preventing unsafe styles from being processed. [1, 2]

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Impact Analysis

This vulnerability can lead to information disclosure, meaning that sensitive data could be exposed to unauthorized parties. Since the flaw is in the HTML style sanitizer, attackers might exploit it to leak confidential information through crafted CSS styles. This could compromise user privacy and the security of communications handled by Roundcube Webmail. [1, 2]

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Mitigation Strategies

To mitigate the CVE-2025-68460 vulnerability, you should upgrade Roundcube Webmail to version 1.6.12 or 1.5.12, as these versions contain fixes for the information disclosure issue in the HTML style sanitizer. The update improves the CSS sanitizer to reject malformed or malicious CSS declarations that could lead to sensitive information leakage. [1]

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