Medium severity · published Aug 1, 2026
CVE-2026-18435
Kadence Blocks <= 3.7.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'toggleIcon' Block Attribute
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'toggleIcon' Block Attribute in all versions up to, and including, 3.7.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-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)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KB
Kadence Blocks — Page Builder Toolkit for Gutenberg Editor · stellarwp
through 3.7.8 · source: vendor
Affected product
KB
Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
stellarwp
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18435
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18435
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.8/includes/blocks/class-kadence-blocks-table-of-contents-block.php#L293
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.8/includes/class-kadence-blocks-table-of-contents.php#L936
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?reponame=&old=3624906%40kadence-blocks&new=3624906%40kadence-blocks
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/5f346cc7-92ad-4f76-a71c-864c22ed56b5?source=cve
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