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
Magento Inclusion of Functionality from Untrusted Control Sphere Vulnerability (CVE-2019-8154)
Chamilo Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2021-32925)
WordPress Plugin My Calendar Cross-Site Scripting (3.2.17)
WordPress Plugin Amazon Product in a Post SQL Injection (3.5.2)