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CVE-2026-16267— Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field

Quick assessment

Affected
Unknown Newsletters
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 Newsletters是WordPress基金会的一款新闻通讯管理工具。 WordPress Newsletters 4.16之前版本存在安全漏洞，该漏洞源于对公共表单提交的值进行反序列化时未限制允许的类，可能导致未经身份验证的攻击者注入任意PHP对象。

AI Predicted 9.8 Difficulty: Easy EPSS 0.45% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Newsletters < 4.16 affected
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I. Basic Information for CVE-2026-16267

Vulnerability Information
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Vulnerability Title
Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field
Source: CVE Program / CVE List V5
Vulnerability Description
The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.
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 Newsletters 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Newsletters是WordPress基金会的一款新闻通讯管理工具。 WordPress Newsletters 4.16之前版本存在安全漏洞，该漏洞源于对公共表单提交的值进行反序列化时未限制允许的类，可能导致未经身份验证的攻击者注入任意PHP对象。
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 Newsletters 0 ~ 4.16 -

II. Public POCs for CVE-2026-16267

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III. Intelligence Information for CVE-2026-16267

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Vendor Advisories for CVE-2026-16267 (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-2026-16558 YMC Filter < 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema
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

IV. Related Vulnerabilities

Same product: Newsletters
Same vendor: Unknown

V. Comments for CVE-2026-16267

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