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CVE-2026-4801 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L218	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L245	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L246	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L255	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L91	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L218	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L245	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L246	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L255	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L91	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/changeset/3475789/coblocks/trunk/src/blocks/events/index.php	[email protected]	Source CodeVendor
https://plugins.trac.wordpress.org/changeset?old_path=%2Fcoblocks/tags/3.1.16&new_path=%2Fcoblocks/tags/3.1.17	[email protected]	Source CodeVendor
https://www.wordfence.com/threat-intel/vulnerabilities/id/bde0aef3-aa61-4ee7-9cbf-9f51cb5ac700?source=cve	[email protected]	AdvisoryRemedy

see all 13 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
Page Builder Gutenberg Blocks - CoBlocks	All versions
CPE No CPEs found in CPE dictionary for this product. Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 18, 2026	New CVE Received	[email protected]