CVE-2026-125454— WordPress Passster plugin <= 4.3.21 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected

WP Chill Passster

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 Chill Passster 内容保护插件中存在“网页生成期间输入未正确净化（跨站脚本攻击）”漏洞，可导致存储型跨站脚本攻击（Stored XSS）。该问题影响 Passster 插件从未知版本至 4.3.21 的所有版本。

CVSS 6.5 · Medium Updated Nov 11, 2026

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Vulnerability Information

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Vulnerability Title

WordPress Passster plugin <= 4.3.21 - Cross Site Scripting (XSS) vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill Passster content-protector allows Stored XSS.This issue affects Passster: from n/a through 4.3.21.

Source: CVE Program / CVE List V5

CVSS Information

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

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
WP Chill	Passster	0 ~ 4.3.21	-

II. Public POCs for CVE-2026-125454

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-125454

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Other References for CVE-2026-125454 (1)

https://patchstack.com/database/wordpress/plugin/content-protector/vulnerability/wordpress-passster-plugin-4-3-21-cross-site-scripting-xss-vulnerability?_s_id=cve vdb-entry

https://www.cve.org/CVERecord?id=CVE-2026-125454

Same Patch Batch · WP Chill · 2026-11-11 · 3 CVEs total

CVE-2026-121028	5.3 MEDIUM	WordPress Strong Testimonials plugin <= 3.3.17 - Content Injection vulnerability
CVE-2026-121574	5.3 MEDIUM	WordPress Passster plugin <= 4.3.20 - Broken Access Control vulnerability

IV. Related Vulnerabilities

Same product: Passster

Same vendor: WP Chill

Same weakness: CWE-79