CVE-2026-7637

CRITICAL

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 m...

Affects 0 products across 6 vendors.

BCS6.47
CVSS 3.19.8
EPSS0.6%
Percentile44th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-502: Deserialization of Untrusted Data

Software deserializes untrusted data without validation, allowing crafted objects to execute arbitrary code.

Related Attack Patterns (CAPEC)
CAPEC-586 Object Injection
via CWE-502

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ SAGE Intelligence — CITED Relevance Research Team

The Boost plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.0.3 due to deserialization of untrusted input in the STYXKEY-BOOST_USER_LOCATION cookie. This could allow unauthenticated attackers to inject a PHP Object, though no known POP chain exists, limiting the immediate impact.

BSID: BS-2026-GLOBAL-154829-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2026-7637?
The Boost plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.0.3 due to deserialization of untrusted input in the STYXKEY-BOOST_USER_LOCATION cookie. This could allow unauthenticated attackers to inject a PHP Object, though no known POP chain exists, limiting the immediate impact.
What is the CVSS score for CVE-2026-7637?
CVE-2026-7637 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.6%.
Is CVE-2026-7637 actively exploited?
No confirmed active exploitation of CVE-2026-7637 as of 2026-07-25.
How do I remediate CVE-2026-7637?
Priority: HIGH.
What systems are affected by CVE-2026-7637?
CVE-2026-7637 affects: Boost, Files, Plugin, Retrieve, Target, Wordpress.
Vulnerability Details
CVE IDCVE-2026-7637
BSIDBS-2026-GLOBAL-154829-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-05-20
Last Modified2026-07-24
ICS Relevance15%
Weakness (CWE)
SourceNVD
Official 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: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability arises from the deserialization of untrusted data from the STYXKEY-BOOST_USER_LOCATION cookie. An attacker could potentially exploit this to inject a PHP object, which could lead to arbitrary code execution if a suitable PHP Object Injection (POI) chain is found in conjunction with other plugins or themes.

Exploitation Likelihood: MEDIUM

Affected Products
VendorProductFixed Version
Boost —
Files —
Plugin —
Retrieve —
Target —
Wordpress —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: July 2026 | Threat Age: 66 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hasha1cce5b50c017d40528387a2307ac029838af4c65471289f38030d5dad9a79ab0eb07ba519e667a8c8b595778c2d4d90fa4818bd135913d47698ce6ec80e1176
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