Description
steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Cascading Style Sheets (CSS) stylesheet, which allows remote authenticated users to trigger arbitrary outbound TCP connections from the server, and possibly obtain sensitive information, via a crafted request.
Remediation
References
Related Vulnerabilities
Oracle HTTP Server CVE-2021-2315 Vulnerability (CVE-2021-2315)
WordPress Plugin MiwoFTP-File & Folder Manager Arbitrary File Download (1.0.5)
Moodle Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-3388)
WordPress Plugin Image Optimizer, Resizer and CDN-Sirv Cross-Site Scripting (6.8.0)