CVE-2026-3639: PPWP – Password Protect Pages <= 1.9.21 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

Published Aug 13, 2026
·
Updated

The PPWP – Password Protect Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's ppwp shortcode attributes in all versions up to, and including, 1.9.21 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected Software

1 affected component
WordPress PPWP – Password Protect Pages<=1.9.21

Event History

Aug 13, 2026
CVE Published
via MITRE·07:37 AM
Data Sourced
via MITRE·07:37 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-3639?

The severity of CVE-2026-3639 is medium with a score of 6.4.

2

How do I fix CVE-2026-3639?

To fix CVE-2026-3639, update the PPWP – Password Protect Pages plugin to a version higher than 1.9.21.

3

What type of vulnerability is CVE-2026-3639?

CVE-2026-3639 is a Stored Cross-Site Scripting (XSS) vulnerability.

4

Who is affected by CVE-2026-3639?

CVE-2026-3639 affects users of the PPWP – Password Protect Pages plugin for WordPress up to version 1.9.21.

5

What causes the vulnerability in CVE-2026-3639?

CVE-2026-3639 is caused by insufficient input sanitization and output escaping on user-supplied attributes in the plugin's shortcode.

Company

Resources

Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
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info@secalerts.co
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CVE-2026-3639 - PPWP – Password Protect Pages <= 1.9.21 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes - SecAlerts