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TI-2026-00354 Aliases CVE-2026-0551GHSA-fgg6-3rw5-h3j8

PPWP – Password Protect Pages <= 1.9.18 - Authenticated (Contributor+) PHP Object Injection via post_protection_roles

Priority MEDIUM 41CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00749 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
buildwpsPPWP – Password Protect Pagesup to 1.9.18—No fix listedCNA
  • PPWP – Password Protect Pages Vendorbuildwps Affected up to 1.9.18 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-0551
  2. 2026-10-03 Alias added: GHSA-fgg6-3rw5-h3j8

References

Other 3

  • TI-2026-83464 Stored cross-site scripting in PPWP password protect plugin CVSS 3.1HIGH 7.2
  • TI-2026-03322 Prevent Direct Access – Protect WordPress Files <= 2.8.8.8 - Unauthenticated Protected File Access CVSS 3.1MEDIUM 5.3
  • TI-2025-03469 Prevent Direct Access – Protect WordPress Files <= 2.8.8 - Unauthenticated Sensitive Information Exposure CVSS 3.1MEDIUM 5.3
  • TI-2024-10450 PPWP – Password Protect Pages <= 1.9.5 - Unauthenticated Content Restriction Bypass to Sensitive Information Exposure CVSS 3.1MEDIUM 5.3
  • TI-2026-03139 Cross-site scripting in buildwps PPWP – Password Protect Pages CVSS 3.1MEDIUM 6.4
  • TI-2025-09063 Password Protect WordPress Lite <= 1.9.21 - Authenticated (Contributor+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.4
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences