Seraphinite Accelerator <= 2.29.18 - Cross-Site Scripting

The Seraphinite Accelerator plugin for WordPress up to and including 2.29.18 was vulnerable to reflected cross-site scripting through the seraphaccelprep parameter. CacheExtractPreparePageParams compared the expected HMAC against the JSON-decoded nonce with PHP's loose != operator, so a JSON...