PixelYourSite Boost Plugin up to 2.0.3 on WordPress STYXKEY-BOOST_USER_LOCATION deserialization

Summaryinfo

A vulnerability has been found in PixelYourSite Boost Plugin up to 2.0.3 on WordPress and classified as critical. Impacted is an unknown function. The manipulation of the argument STYXKEY-BOOST_USER_LOCATION leads to deserialization. This vulnerability is uniquely identified as CVE-2026-7637. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in PixelYourSite Boost Plugin up to 2.0.3 on WordPress. It has been rated as critical. This issue affects an unknown part. The manipulation of the argument STYXKEY-BOOST_USER_LOCATION with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Boost plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.0.3 via deserialization of untrusted input in the STYXKEY-BOOST_USER_LOCATION cookie. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

The weakness was disclosed by Osvaldo Noe Gonzalez Del Rio. It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-7637 since 05/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• PixelYourSite

Name

• Boost Plugin

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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