CVE-2026-1646
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2Description
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.
Analysis
Stored cross-site scripting in the Advance Block Extend WordPress plugin versions up to 1.0.4 allows authenticated contributors and above to inject malicious scripts through the TitleColor attribute in the Latest Posts block, which execute in the browsers of users viewing affected pages. The vulnerability stems from inadequate input sanitization and output escaping, enabling persistent payload injection. …
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Remediation
Within 30 days: Identify affected systems running for WordPress is vulnerable to Stored Cross-Site Scripting v and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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