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CVE-2026-0551— PPWP – Password Protect Pages <= 1.9.18 - Authenticated (Contributor+) PHP Object Injection via post_protection_roles

Quick assessment

Affected
buildwps PPWP – Password Protect Pages
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WP Folio Team PPWP是WP Folio Team团队的一款CMS插件，用于密码保护WordPress页面。 WP Folio Team PPWP 1.9.18及之前版本存在反序列化注入漏洞，该漏洞源于对post_protection_roles参数的不受信任输入进行反序列化，可能导致具有贡献者及以上权限的已认证攻击者注入PHP对象，若存在POP链则可删除任意文件、获取敏感数据或执行代码。

CVSS 8.8 · High EPSS 0.75% · P55

Affected Version Matrix 1

VendorProduct Version RangeStatus
buildwps PPWP – Password Protect Pages ≤ 1.9.18 affected
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I. Basic Information for CVE-2026-0551

Vulnerability Information
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Vulnerability Title
PPWP – Password Protect Pages <= 1.9.18 - Authenticated (Contributor+) PHP Object Injection via post_protection_roles
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
WP Folio Team PPWP 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WP Folio Team PPWP是WP Folio Team团队的一款CMS插件，用于密码保护WordPress页面。 WP Folio Team PPWP 1.9.18及之前版本存在反序列化注入漏洞，该漏洞源于对post_protection_roles参数的不受信任输入进行反序列化，可能导致具有贡献者及以上权限的已认证攻击者注入PHP对象，若存在POP链则可删除任意文件、获取敏感数据或执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
buildwps PPWP – Password Protect Pages 0 ~ 1.9.18 -

II. Public POCs for CVE-2026-0551

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III. Intelligence Information for CVE-2026-0551

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Patches & Fixes for CVE-2026-0551 (1)

Vendor Advisories for CVE-2026-0551 (1)

IV. Related Vulnerabilities

Same product: PPWP – Password Protect Pages
Same vendor: buildwps
Same weakness: CWE-502