CVE-2026-17532

EIP tracks 1 public exploit for CVE-2026-17532. PoCs published by kalhoralireza.

AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2026-17532, an unauthenticated reflected XSS vulnerability in Seraphinite Accelerator (WordPress plugin <= 2.29.18). The exploit bypasses HMAC signature checks by sending a JSON boolean `true` as the nonce, which passes PHP's loose comparison, and injects unescaped JavaScript via the `selfTest` parameter.

The Seraphinite Accelerator plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'seraph_accel_prep' parameter in versions up to, and including, 2.29.15. This is due to the CacheExtractPreparePageParams() function using PHP's loose inequality operator (!=) to compare the expected HMAC string against the JSON-decoded 'nonce' value — supplying the JSON boolean true causes any non-empty HMAC string to compare as loosely equal, bypassing the signature check — combined with insufficient output escaping in the _CbContentFinishSkip() function, which concatenates the attacker-controlled 'selfTest' field directly into the HTML response body. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.