Stored Cross-Site Scripting Vulnerability in Advance Block Extend for WordPress

CVE-2026-1646

What is CVE-2026-1646?

The Advance Block Extend plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability due to inadequate input sanitization and output escaping in the TitleColor block attribute of the Latest Posts Gutenberg block. This flaw allows authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages. These malicious scripts will execute whenever a user accesses the modified pages, posing serious security risks.

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