CVE-2021-24760: Gutenberg PDF Viewer Block < 1.0.1 - Contributor+ Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-18 · updated 2026-06-17
Weakness: CWE-79

Description

The Gutenberg PDF Viewer Block WordPress plugin before 1.0.1 does not sanitise and escape its block, which could allow users with a role as low as Contributor to perform Cross-Site Scripting attacks.

Affected products

Gutenberg PDF Viewer Block: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: Gutenberg PDF Viewer Block 1.0.1. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/aebf821f-1724-4e4c-8d42-5a94e509d271
https://wpscan.com/vulnerability/aebf821f-1724-4e4c-8d42-5a94e509d271

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