CVE-2023-0033: PDF Viewer < 1.0.0 - Contributor+ Stored XSS via Shortcode

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-01-30 · updated 2026-06-17

Description

The PDF Viewer WordPress plugin before 1.0.0 does not validate and escape one of its shortcode attributes, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attack.

Affected products

PDF Viewer: before 1.0.0 — fixed in 1.0.0

How to fix

Upgrade to a fixed version: PDF Viewer 1.0.0. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/2d9ae43b-75a7-4fcc-bce3-d9e9d7a97ec0
https://wpscan.com/vulnerability/2d9ae43b-75a7-4fcc-bce3-d9e9d7a97ec0

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