CVE-2026-1646
Advance Block Extend <= 1.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via TitleColor Block Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The Advance Block Extend plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the TitleColor block attribute in the Latest Posts Gutenberg block in all versions up to, and including, 1.0.4 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.
| CWE | CWE-79 |
| Vendor | iamjaydip |
| Product | advance block extend |
| Published | Feb 19, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
iamjaydip / Advance Block Extend
0 ≤ 1.0.4
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/3218716a-cce6-4ce7-a6be-4e146e0a6d53?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/advance-block-extend/trunk/gutenberg-block.php#L118 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/advance-block-extend/tags/1.0.4/gutenberg-block.php#L118
Credits
Athiwat Tiprasaharn Itthidej Aramsri Vilaysone CHANTHAVONG