CVE-2023-0033: 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 Script

medium Affects pdf-viewer (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2023-01-30; advisory modified 2026-06-17.

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 Script

Package: pdf-viewer (WordPress plugin) WordPress
Affected versions: <1.0.0
Fixed in: 1.0.0
Severity: medium CVSS 5.4
Exploitation: not on CISA KEV · EPSS 0% (40.6th percentile)
Published: 2023-01-30
Source: nvd

References

NVD record pdf-viewer (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2023-6553 critical The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all ve also from 2023
CVE-2023-0315 high Froxlor vulnerable to Command Injection also from 2023
CVE-2023-41892 critical Craft CMS Remote Code Execution vulnerability also from 2023
CVE-2023-0992 high The Shield Security plugin for WordPress is vulnerable to stored Cross-Site Scripting in v also from 2023
CVE-2023-23488 critical The Paid Memberships Pro WordPress Plugin, version < 2.9.8, is affected by an unauthentica also from 2023
CVE-2023-6875 critical The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for Wo also from 2023