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CVE-2026-16268— Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler

Quick assessment

Affected
Unknown Newsletters
Exploitation
Public or AI PoC available; prioritize validation
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基金会的一款由 Tribulant Software 开发的 WordPress 邮件订阅与新闻通讯插件，提供邮件列表管理、模板构建、订阅表单、邮件追踪、自动回复等全功能，支持免费版和付费专业版。 WordPress Newsletters 4.16之前版本存在服务端请求伪造漏洞，该漏洞源于在服务端获取用户提供的URL之前未对弹回处理请求进行身份验证或验证，可能导致未经身份验证的攻击者使站点向任意内部或外部主机发出请求。

AI Predicted 8.6 Difficulty: Easy EPSS 0.73% · P53

Public Exploits 1

Nuclei · 1 CVE-2026-16268.yaml [template]

Possible ATT&CK Techniques 1 AI

T1105 · Ingress Tool Transfer

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Newsletters < 4.16 affected
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I. Basic Information for CVE-2026-16268

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Newsletters < 4.16 - Unauthenticated Server-Side Request Forgery via SNS Bounce Handler
Source: CVE Program / CVE List V5
Vulnerability Description
The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.
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 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Newsletters是WordPress基金会的一款由 Tribulant Software 开发的 WordPress 邮件订阅与新闻通讯插件，提供邮件列表管理、模板构建、订阅表单、邮件追踪、自动回复等全功能，支持免费版和付费专业版。 WordPress Newsletters 4.16之前版本存在服务端请求伪造漏洞，该漏洞源于在服务端获取用户提供的URL之前未对弹回处理请求进行身份验证或验证，可能导致未经身份验证的攻击者使站点向任意内部或外部主机发出请求。
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-2026-16268

# POC Description Source Link Shenlong Link
1 Newsletters WordPress plugin < 4.16 contains a server-side request forgery caused by lack of authentication and validation in bounce-processing requests, letting unauthenticated attackers make arbitrary requests to internal or external hosts. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-16268.yaml POC Details
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III. Intelligence Information for CVE-2026-16268

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Vendor Advisories for CVE-2026-16268 (1)

Same Patch Batch · Unknown · 2026-08-06 · 49 CVEs total

CVE-2026-11976 10.0 CRITICAL MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise
CVE-2026-14812 10.0 CRITICAL Premium SEO - Unauthenticated Backdoor (Admin Creation / RCE / SSRF / Content Injection)
CVE-2026-17032 9.8 CRITICAL Supsystic Multiple Pro Plugins - Backdoor via Compromised Vendor Update Server
CVE-2026-3430 8.6 HIGH Creative Mail 1.6.5 - 1.6.9 - Unauthenticated SQLi
CVE-2026-10599 7.5 HIGH Integrate PhonePe with WooCommerce <= 1.2.1 - Unauthenticated Payment Bypass via Transacti
CVE-2026-12584 7.5 HIGH Payment Gateway for Redsys & WooCommerce Lite < 7.0.2 - Unauthenticated Payment Confirmati
CVE-2026-13399 7.5 HIGH Payment Plugins for PayPal WooCommerce < 2.0.20 - Unauthenticated Payment Bypass via Reuse
CVE-2026-10524 7.5 HIGH CoCart < 4.9.0 - Unauthenticated Arbitrary Price Manipulation
CVE-2026-16620 7.5 HIGH WPC Name Your Price for WooCommerce < 2.2.5 - Unauthenticated Price Manipulation via Selec
CVE-2026-16619 7.5 HIGH miniOrange 2FA < 6.2.8 - 2FA Bypass via Unlimited Second-Factor Attempts
CVE-2026-5336 6.8 MEDIUM Dataverse Integration < 2.91 - Contributor+ Server-Side Template Injection (SSTI) to Infor
CVE-2026-12901 5.9 MEDIUM GetPaid < 2.8.55 - Unauthenticated Worldpay Payment Bypass via Insufficient IPN Verificati
CVE-2026-11361 5.9 MEDIUM Formidable Forms < 6.32.1 - Unauthenticated Payment Bypass via PayPal APPROVAL_PENDING Sub
CVE-2026-15152 5.3 MEDIUM WP Hotel Booking < 2.3.2 - Unauthenticated PayPal Payment Bypass
CVE-2026-14831 5.3 MEDIUM Easy Booking < 3.5.0 - Unauthenticated Minimum Booking Duration Bypass
CVE-2026-13342 5.3 MEDIUM Security Optimizer – The All-In-One Protection Plugin < 1.6.5 - Login Access IP Allowlist
CVE-2026-15149 5.3 MEDIUM WP Hotel Booking < 2.3.3 - Unauthenticated Payment Bypass via Price Manipulation
CVE-2026-16067 5.3 MEDIUM Event Booking Manager for WooCommerce (Pro) < 5.0.3 - Unauthenticated Payment Bypass via C
CVE-2026-15147 5.3 MEDIUM Five Star Restaurant Reservations < 2.7.23 - Unauthenticated Payment Bypass and Booking Co
CVE-2026-15208 5.3 MEDIUM RegistrationMagic < 6.0.9.5 - Unauthenticated Payment Bypass via Amount-Blind PayPal Verif

Showing top 20 of 49 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Newsletters
Same vendor: Unknown

V. Comments for CVE-2026-16268

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