Medium severity6.4NVD Advisory· Published Apr 28, 2026· Updated Apr 28, 2026
CVE-2026-6551
CVE-2026-6551
Description
The Timeline Blocks for Gutenberg plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'titleTag' attribute of the timeline-blocks/tb-timeline-blocks block in all versions up to, and including, 1.1.10 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Affected products
1- Range: <=1.1.10
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- plugins.trac.wordpress.org/browser/timeline-blocks/tags/1.1.10/src/blocks/index.phpnvd
- plugins.trac.wordpress.org/browser/timeline-blocks/tags/1.1.10/src/blocks/index.phpnvd
- plugins.trac.wordpress.org/browser/timeline-blocks/trunk/src/blocks/index.phpnvd
- plugins.trac.wordpress.org/browser/timeline-blocks/trunk/src/blocks/index.phpnvd
- plugins.trac.wordpress.org/browser/timeline-blocks/trunk/src/blocks/index.phpnvd
- plugins.trac.wordpress.org/browser/timeline-blocks/trunk/src/blocks/index.phpnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/393d1b30-19f8-454d-84c0-0b539953e1fenvd
News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (April 27, 2026 to May 3, 2026)Wordfence Blog · May 7, 2026