CVE-2026-121721

MEDIUM 6.5

WordPress Gutenberg Blocks plugin <= 3.7.6 - Cross Site Scripting (XSS) vulnerability

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in PublishPress Gutenberg Blocks advanced-gutenberg allows Stored XSS.This issue affects Gutenberg Blocks: from n/a through 3.7.6.

CWE	CWE-79
Vendor	publishpress
Product	gutenberg blocks
Published	Nov 13, 2026
Last Updated	Nov 13, 2026

Stay Ahead of the Next One

Get instant alerts for publishpress gutenberg blocks

Be the first to know when new medium vulnerabilities affecting publishpress gutenberg blocks are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Affected Versions

PublishPress / Gutenberg Blocks

0 ≤ 3.7.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/wordpress/plugin/advanced-gutenberg/vulnerability/wordpress-gutenberg-blocks-plugin-3-7-6-cross-site-scripting-xss-vulnerability?_s_id=cve

Credits

mroccon | Patchstack Bug Bounty Program