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CVE-2026-4801

MEDIUM

6.4

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.

Details CVE

Score CVSS v3.16.4

SeveriteMEDIUM

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

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie4/18/2026

Derniere modification4/22/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-79

References

https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L218(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L245(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L246(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L255(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/tags/3.1.16/src/blocks/events/index.php#L91(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L218(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L245(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L246(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L255(security@wordfence.com)

https://plugins.trac.wordpress.org/browser/coblocks/trunk/src/blocks/events/index.php#L91(security@wordfence.com)

https://plugins.trac.wordpress.org/changeset/3475789/coblocks/trunk/src/blocks/events/index.php(security@wordfence.com)

https://plugins.trac.wordpress.org/changeset?old_path=%2Fcoblocks/tags/3.1.16&new_path=%2Fcoblocks/tags/3.1.17(security@wordfence.com)

https://www.wordfence.com/threat-intel/vulnerabilities/id/bde0aef3-aa61-4ee7-9cbf-9f51cb5ac700?source=cve(security@wordfence.com)

Correlations IOC

Aucune correlation enregistree

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