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CVE-2026-16558— YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema

Quick assessment

Affected
Unknown YMC Filter
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 YMC Filter是WordPress基金会开源的一款内容筛选组件。 WordPress YMC Filter 3.12.8之前版本存在安全漏洞，该漏洞源于在公共端点输出布局构建器设置之前未进行清理和转义，并且保存设置时未验证对象所有权，可能导致具有贡献者角色及以上的用户存储JavaScript，并在任何查看受影响筛选器的访客浏览器中执行。

AI Predicted 6.1 Difficulty: Easy EPSS 0.23% · P12

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown YMC Filter 3.6.0< 3.12.8 affected
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I. Basic Information for CVE-2026-16558

Vulnerability Information
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Vulnerability Title
YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema
Source: CVE Program / CVE List V5
Vulnerability Description
The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress YMC Filter 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress YMC Filter是WordPress基金会开源的一款内容筛选组件。 WordPress YMC Filter 3.12.8之前版本存在安全漏洞，该漏洞源于在公共端点输出布局构建器设置之前未进行清理和转义，并且保存设置时未验证对象所有权，可能导致具有贡献者角色及以上的用户存储JavaScript，并在任何查看受影响筛选器的访客浏览器中执行。
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
Unknown YMC Filter 3.6.0 ~ 3.12.8 -

II. Public POCs for CVE-2026-16558

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III. Intelligence Information for CVE-2026-16558

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Vendor Advisories for CVE-2026-16558 (1)

Same Patch Batch · Unknown · 2026-08-08 · 17 CVEs total

CVE-2026-16955 AI Engine < 3.6.6 - Subscriber+ Arbitrary File Read via Audio Transcription
CVE-2026-16953 AI Engine < 3.6.4 - Unauthenticated Cross-Session Chatbot File Deletion via Forgeable Sess
CVE-2026-16595 WP Directory Kit < 1.5.5 - Subscriber+ User and Unpublished Listing Disclosure
CVE-2026-16608 Download Monitor < 5.2.6 - Unauthenticated Download Log Injection
CVE-2026-16948 Solace Extra < 1.6.1 - Subscriber+ Multiple Missing Authorization via Site-Wide Nonce Expo
CVE-2026-16594 WP Directory Kit < 1.5.5 - Subscriber+ Plugin Settings and API Key Disclosure
CVE-2026-16590 WP Directory Kit < 1.5.5 - Subscriber+ Contact Message and User Data Disclosure
CVE-2026-16578 Admin Safety Guard < 1.4.0 - Unauthenticated User Data Disclosure via 2fa/app/users REST R
CVE-2026-16574 Dokan < 5.0.11 - Vendor+ Cross-Vendor Downloadable Product Access Grant via Order Download
CVE-2026-16562 WP Statistics < 14.16.10 - Subscriber+ Sensitive Data Disclosure via Metabox AJAX Handlers
CVE-2026-16589 WP Directory Kit < 1.5.5 - Subscriber+ SQL Injection via data_fields_list Parameter
CVE-2026-16535 Link Library < 7.9.4 - Reflected XSS via Thumbs-Rating likelabel
CVE-2026-16282 Appointment Hour Booking < 1.5.88 - Unauthenticated Booking Price Manipulation via tcost P
CVE-2026-16269 Newsletters < 4.16 - Unauthenticated API Authentication Bypass via Type Juggling
CVE-2026-16559 YMC Filter < 3.12.9 - Author+ Stored XSS via SVG Icon Upload
CVE-2026-16267 Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field

IV. Related Vulnerabilities

Same product: YMC Filter
Same vendor: Unknown

V. Comments for CVE-2026-16558

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