CVE-2026-12430

The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.1.45 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

CVSS v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/extension.php#L709
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/views/single-top.php#L206
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/views/single-top.php#L232
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/extension.php#L709
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/views/single-top.php#L206
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/views/single-top.php#L232
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3576066%40blocksy-companion&new=3576066%40blocksy-companion&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/fac4ae61-cfc6-4efc-9f57-58fa39e00f07?source=cve

Configurations

No configuration.

History

19 Jun 2026, 06:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-19 06:17

Updated : 2026-06-22 16:43

NVD link : CVE-2026-12430

Mitre link : CVE-2026-12430

CVE.ORG link : CVE-2026-12430

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-12430", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-12430", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-22T14:56:00.197925Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@wordfence.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 4.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 1.3}]}, "affected": [{"source": "security@wordfence.com", "affectedData": [{"vendor": "creativethemeshq", "product": "Blocksy Companion", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "2.1.45"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-19T06:17:01.513", "references": [{"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/extension.php#L709", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/views/single-top.php#L206", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/product-reviews/views/single-top.php#L232", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/extension.php#L709", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/views/single-top.php#L206", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/product-reviews/views/single-top.php#L232", "source": "security@wordfence.com"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3576066%40blocksy-companion&new=3576066%40blocksy-companion&sfp_email=&sfph_mail=", "source": "security@wordfence.com"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/fac4ae61-cfc6-4efc-9f57-58fa39e00f07?source=cve", "source": "security@wordfence.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security@wordfence.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.1.45 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled."}], "lastModified": "2026-06-22T16:43:14.450", "sourceIdentifier": "security@wordfence.com"}