CVE-2026-2951: Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor <= 3.5.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutentor Block HTML

Medium severity · published Apr 23, 2026

CVE-2026-2951

Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor <= 3.5.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via Gutentor Block HTML

5.4

CVSS

0.2%

EPSS

On KEV

Description

The Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.5.5 due to insufficient input sanitization and output escaping. 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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

Required

Confidentiality

Low

Integrity

Low

Availability

None

Scope

Changed

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 6% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor · gutentor

through 3.5.5 · source: vendor

Affected product

Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor

gutentor

All Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-2951

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-2951

plugins.trac.wordpress.org

https://plugins.trac.wordpress.org/changeset/3495930/gutentor

www.wordfence.com

https://www.wordfence.com/threat-intel/vulnerabilities/id/d7c639b8-35f5-4eaf-a663-1adab3ba2a16?source=cve

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