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CVE-2026-7637— Boost <= 2.0.3 - Unauthenticated PHP Object Injection via STYXKEY-BOOST_USER_LOCATION Cookie

CVSS 9.8 · Critical EPSS 0.11% · P29

Affected Version Matrix 1

VendorProductVersion RangeStatus
PixelYourSiteBoost≤ 2.0.3affected
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I. Basic Information for CVE-2026-7637

Vulnerability Information
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Vulnerability Title
Boost <= 2.0.3 - Unauthenticated PHP Object Injection via STYXKEY-BOOST_USER_LOCATION Cookie
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
可信数据的反序列化
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Boost 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Boost 2.0.3及之前版本存在代码问题漏洞，该漏洞源于对STYXKEY-BOOST_USER_LOCATION cookie中不可信输入的反序列化，可能导致PHP对象注入，若存在POP链则可能删除任意文件、检索
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
PixelYourSiteBoost 0 ~ 2.0.3 -

II. Public POCs for CVE-2026-7637

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III. Intelligence Information for CVE-2026-7637

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Vendor Advisories for CVE-2026-7637 (1)

Same Patch Batch · PixelYourSite · 2026-05-20 · 3 CVEs total

CVE-2026-90107.5 HIGHBoost <= 2.0.3 - Unauthenticated Blind SQL Injection via Multiple Parameters
CVE-2026-76137.2 HIGHCost of Goods by PixelYourSite <= 1.2.12 - Unauthenticated Stored Cross-Site Scripting via

IV. Related Vulnerabilities

Same product: Boost
Same vendor: PixelYourSite
Same weakness: CWE-502

V. Comments for CVE-2026-7637

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