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CVE PROGRAM SOURCE RECORD6.1 Medium

CVE-2026-17532

Seraphinite Accelerator <= 2.29.18 - Reflected Cross-Site Scripting

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Status
Published
Published
Updated
Assigning organization
Wordfence

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

seraphinitesoft Seraphinite Accelerator

Default version status: unaffected

  • 0 to ≤ 2.29.18affected

References