CVE-2021-24759: PDF.js Viewer < 2.0.2 - Contributor+ Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-06 · updated 2026-06-17
Weakness: CWE-79

Description

The PDF.js Viewer WordPress plugin before 2.0.2 does not escape some of its shortcode and Gutenberg Block attributes, which could allow users with a role as low as Contributor to to perform Cross-Site Scripting attacks

Affected products

PDF.js Viewer: before 2.0.2 — fixed in 2.0.2

How to fix

Upgrade to a fixed version: PDF.js Viewer 2.0.2. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/38274ef2-5100-4669-9544-a42346b6727d
https://wpscan.com/vulnerability/38274ef2-5100-4669-9544-a42346b6727d

Get alerted when CVE-2021-24759 or the next vulnerability affects your stack