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Five Star Business Profile and Schema CVE-2026-27436

| EUVDEUVD-2026-41338 CRITICAL
Code Injection (CWE-94)
2026-07-02 Patchstack GHSA-5qwh-74pw-p44j
9.1
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
vuln.today AI
9.1 CRITICAL

Network-reachable authenticated code injection requiring an Editor/high-privilege role (PR:H), no user interaction, with RCE breaching the host beyond the plugin (S:C) and full C/I/A loss.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
Analysis Generated
Jul 02, 2026 - 12:00 vuln.today

DescriptionCVE.org

Editor Arbitrary Code Execution in Five Star Business Profile and Schema <= 2.3.19 versions.

AnalysisAI

Remote code execution in the Five Star Business Profile and Schema WordPress plugin (versions up to and including 2.3.19) allows an attacker holding an Editor-level or higher account to inject and execute arbitrary PHP code on the host. Reported by Patchstack and rated CVSS 9.1 due to its scope-changing impact, the flaw turns a trusted content role into full server compromise. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but the CWE-94 code-injection root cause makes reliable exploitation straightforward for any authorized high-privilege user.

Technical ContextAI

The affected component is a WordPress plugin published by the vendor 'rustaurius' (CPE cpe:2.3:a:rustaurius:five_star_business_profile_and_schema), which adds business-profile and schema.org structured-data functionality to WordPress sites. The vulnerability is classified as CWE-94 (Improper Control of Generation of Code, i.e. Code Injection): attacker-controlled input reaches a PHP execution sink - typically eval(), call_user_func(), a dynamic include, or serialized/templated data that is later interpreted as code - without adequate validation. Because WordPress runs as a single PHP process, injected code executes with the privileges of the web server, which is why CVSS marks a scope change (S:C) reaching beyond the plugin's own security context to the underlying host.

RemediationAI

Upgrade the Five Star Business Profile and Schema plugin to the first release above 2.3.19; the input data confirms all versions through 2.3.19 are vulnerable but does not specify the exact fixed version, so consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/business-profile/vulnerability/wordpress-five-star-business-profile-and-schema-plugin-2-3-19-arbitrary-code-execution-vulnerability) and the plugin's WordPress.org changelog for the patched build. Until patched, the most effective compensating control is to reduce the required privilege by auditing and minimizing accounts with Editor or higher roles and revoking access from untrusted or unnecessary users, since exploitation depends on holding such a role; enforce strong authentication and MFA on all privileged accounts to prevent account takeover (trade-off: adds login friction for legitimate authors). If the plugin's functionality is non-essential, deactivate and remove it entirely (trade-off: loss of business-profile/schema output and potential SEO impact). Optionally place a WAF or virtual patch in front of the plugin's admin endpoints to block code-injection payloads (trade-off: signatures may be incomplete and can produce false positives).

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CVE-2026-27436 vulnerability details – vuln.today

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