Page Builder Gutenberg Blocks – CoBlocks, CVE-2026-4801

CVE, Research URL: CVE-2026-4801
Home page URL: Security reports for Page Builder Gutenberg Blocks – CoBlocks
Application: Page Builder Gutenberg Blocks – CoBlocks
Published on: Apr 18, 2026
Research Description: The Page Builder Gutenberg Blocks – CoBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via external iCal feed data in all versions up to, and including, 3.1.16 due to insufficient output escaping of event titles, descriptions, and locations fetched from external iCal feeds in the Events block rendering function. 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 versions: max 3.1.17.
Status: vulnerable