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CVE-2021-24964

Description

The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users.

POC

Reference

- https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc

Github

- https://github.com/20142995/nuclei-templates