Blocksy Companion <= 2.1.45 - Authenticated (Editor+) Stored Cross-Site Scripting via 'product_description' Parameter

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Summary

CVECVE-2026-12430
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-19 06:17:01 UTC
Updated2026-06-19 06:17:01 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED4.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Creativethemeshq Blocksy Companion affected 2.1.45 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.45/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.41/framework/extensions/pr... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/fac4ae61-cfc6-4efc-9f57-58fa3... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Pasindu Dilshan (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-16T17:31:26.000ZVendor Notified
CNA2026-06-18T15:44:31.000ZDisclosed
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