Medium severity · published Apr 11, 2026
CVE-2026-3498
BlockArt Blocks <= 2.2.15 - Authenticated (Author+) Stored Cross-Site Scripting via 'clientId' Block Attribute
6.4
CVSS
0.2%
EPSS
No
On KEV
Description
The BlockArt Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'clientId' block attribute in all versions up to, and including, 2.2.15. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BB
BlockArt Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Library · wpblockart
through 2.2.15 · source: vendor
Affected product
BB
BlockArt Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Library
wpblockart
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3498
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3498
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/blockart-blocks/tags/2.2.15/includes/BlockTypes/PostTemplate.php#L67
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/blockart-blocks/tags/2.2.15/includes/BlockTypes/QueryLoop.php#L43
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?old_path=%2Fblockart-blocks/tags/2.2.15&new_path=%2Fblockart-blocks/tags/2.3.0
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/7d0cb432-785a-4f38-830f-72b95e65aa5a?source=cve
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