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CVE Vulnerability Details :

CVE-2026-4801

PUBLISHED

More Info Official Page

Assigner-Wordfence

Assigner Org ID-b15e7b5b-3da4-40ae-a43c-f7aa60e62599

Published At-18 Apr, 2026 | 03:37

Updated At-18 Apr, 2026 | 03:37

▼CVE Numbering Authority (CNA)

Page Builder Gutenberg Blocks <= 3.1.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via External iCal Feed Data

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 Products

Vendor

godaddy

Product

Page Builder Gutenberg Blocks – CoBlocks

Default Status

unaffected

Versions

Affected

From 0 through 3.1.16 (semver)

Problem Types

Type	CWE ID	Description
CWE	CWE-79	CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Type: CWE

CWE ID: CWE-79

Description: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Metrics

Version	Base score	Base severity	Vector
3.1	6.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Version: 3.1

Base score: 6.4

Base severity: MEDIUM

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Credits

finder

Fernando Mecozzi

Timeline

Event	Date
Disclosed	2026-04-17 14:48:43

Event: Disclosed

Date: 2026-04-17 14:48:43

References

Hyperlink	Resource
https://www.wordfence.com/threat-intel/vulnerabilities/id/bde0aef3-aa61-4ee7-9cbf-9f51cb5ac700?source=cve	N/A
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L218	N/A
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L218	N/A
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L245	N/A
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L245	N/A
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L246	N/A
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L246	N/A
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L255	N/A
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L255	N/A
https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L91	N/A
https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L91	N/A
https://plugins.trac.wordpress.org/changeset/3475789/coblocks/trunk/src/blocks/events/index.php	N/A
https://plugins.trac.wordpress.org/changeset?old_path=%2Fcoblocks/tags/3.1.16&new_path=%2Fcoblocks/tags/3.1.17	N/A