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.
History

Mon, 20 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Godaddy
Godaddy page Builder Gutenberg Blocks – Coblocks
Wordpress
Wordpress wordpress
Vendors & Products Godaddy
Godaddy page Builder Gutenberg Blocks – Coblocks
Wordpress
Wordpress wordpress
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 18 Apr 2026 04:30:00 +0000

Type Values Removed Values Added
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.
Title Page Builder Gutenberg Blocks <= 3.1.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via External iCal Feed Data
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-20T14:42:38.120Z

Reserved: 2026-03-25T10:02:15.632Z

Link: CVE-2026-4801

cve-icon Vulnrichment

Updated: 2026-04-20T14:42:34.259Z

cve-icon NVD

Status : Received

Published: 2026-04-18T05:16:23.987

Modified: 2026-04-18T05:16:23.987

Link: CVE-2026-4801

cve-icon Redhat

No data.