CVE-2026-116520— PPWP <= 1.9.26 - Unauthenticated Stored Cross-Site Scripting via '[ppwp]' Shortcode 'desc_below_form' Attribute via Placeholder Marker Collision

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.

WordPress 插件"PPWP – Password Protect Pages"在所有 1.9.26 及更早版本中存在存储型跨站脚本（Stored XSS）漏洞。该漏洞源于对或属性参数（以及作为标记走私辅助的）的输入过滤不足和输出转义缺失。这使得未认证的攻击者能够在页面中注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将被执行。该漏洞可被未认证攻击者利用，原因在于：WordPress 的过滤器不会对不包含 HTML 标签的纯短代码文本进行任何处理，而设置会自动批准来自之前已批准名称和邮

CVSS 7.2 · High Updated Oct 31, 2026

Possible ATT&CK Techniques 2 AI

T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

PPWP <= 1.9.26 - Unauthenticated Stored Cross-Site Scripting via '[ppwp]' Shortcode 'desc_below_form' Attribute via Placeholder Marker Collision

Source: CVE Program / CVE List V5

Vulnerability Description

The PPWP – Password Protect Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment / shortcode attribute desc_below_form (and placeholder as the marker-smuggling helper)' parameter in all versions up to, and including, 1.9.26 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by unauthenticated attackers because WordPress's comment_content filter leaves bare shortcode text (containing no HTML tags) untouched, and the comment_whitelist setting auto-approves subsequent comments from a previously approved name and email without administrator intervention.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
buildwps	PPWP – Password Protect Pages	0 ~ 1.9.26	-

II. Public POCs for CVE-2026-116520

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-116520

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Other References for CVE-2026-116520 (8)

https://www.cve.org/CVERecord?id=CVE-2026-116520

IV. Related Vulnerabilities

Same product: PPWP – Password Protect Pages

Same vendor: buildwps

Same weakness: CWE-79