Horizon Alert
Summary of the vulnerability and why it matters
Roundcube Webmail contains a flaw that allows authenticated users to access arbitrary files on the host system. This vulnerability impacts organizations by potentially exposing sensitive configuration files and other data. Attackers could leverage this to gain unauthorized access to system information.
- Vulnerable: Roundcube Webmail
- Weakness: Arbitrary file access
- Impact: Data exposure, system compromise
Attack Path
How an attacker could exploit the issue
This vulnerability allows an authenticated attacker to access arbitrary files from the host system. Attackers can leverage this by exploiting a flaw in how file-based attachment plugins handle certain requests. This could lead to the exposure of sensitive configuration files and other data.
- Requires authenticated session.
- Attacker sends specific request.
- Arbitrary file access occurs.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows unauthorized access to arbitrary files on a server running Roundcube Webmail. Attackers with valid login credentials could exploit this to obtain sensitive information, including configuration files. The exposure of such data could pose a significant risk to the organization.
- Likely attacker skill level: Low
- Required access or conditions: Authenticated session
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Roundcube Webmail versions prior to 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 contain a vulnerability that could allow unauthorized access to arbitrary files on the host system. Exploitation requires an authenticated user with an active session. This issue relates to file-based attachment plugins and specific request parameters.
- Identify exposed Roundcube Webmail assets.
- Reduce exposure or isolate risk.
- Apply vendor fixes and validate.
- Monitor for related activity.
