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CVE-2026-0551: PPWP – Password Protect Pages

Severity

8.8 (HIGH)

Vendor

BUILDWPS

Affected versions

0 through 1.9.18

Patch status

Unknown

Published

2026-08-23T00:16:49.777

Modified

2026-08-23T00:16:49.777

Why it matters

This matters because the affected product may be exposed on public websites. A vulnerable plugin can create a direct path to site compromise, malicious code deployment, or data theft.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Check whether the affected WordPress plugin or theme is installed.
• Update, disable, or remove the affected component if present.

Technical summary

The PPWP – Password Protect Pages plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.9.18 via deserialization of untrusted input from the 'post_protection_roles' vulnerable parameter. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

View the official NVD record for CVE-2026-0551

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.