CVE-2026-86823— Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
Quick assessment
Affected
Unknown Newsletter
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.
在 9.3.7 版本之前，The Newsletter WordPress 插件未对执行公开订阅操作后的重定向目标进行验证，这使得未认证的攻击者能够将用户重定向到任意外部站点，并泄露订阅令牌，从而获取对该订阅记录前端操作的访问权限。
Possible ATT&CK Techniques 1 AI
T1566.002 · Spearphishing LinkAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Unknown | Newsletter | < 9.3.7 |
affected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-86823
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Newsletter WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.
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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Newsletter | 0 ~ 9.3.7 | - |
|
II. Public POCs for CVE-2026-86823
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-86823
请登录查看更多情报信息。
Other References for CVE-2026-86823 (1)
-
🔗 Newsletter < 9.3.7 – Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter | CVE 2026-86823 | Plugin Vulnerabilities exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-09-16 · 46 CVEs total
| CVE-2026-13407 | 6.1 MEDIUM | Royal Elementor Addons < 1.7.1067 - Unauthenticated Stored HTML Injection in Form Notifica |
| CVE-2026-84906 | 5.3 MEDIUM | Eventin < 4.1.24 - Unauthenticated Payment Bypass via Stripe and PayPal Cross-Order Transa |
| CVE-2026-86475 | 5.3 MEDIUM | Appointment Hour Booking < 1.5.95 - Unauthenticated Booking Capacity Bypass via Multi-Appo |
| CVE-2026-19857 | 4.8 MEDIUM | Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Cu |
| CVE-2026-76552 | WP Import Export Lite < 3.9.33 - Authenticated Arbitrary File Upload via Remote Image Impo | |
| CVE-2026-84907 | Eventin < 4.1.24 - Unauthenticated Order and Attendee Status Reset via Payment REST Endpoi | |
| CVE-2026-76555 | WP Import Export Lite < 3.9.33 - Authenticated Sensitive File Disclosure via Existing File | |
| CVE-2026-76557 | WP Import Export Lite < 3.9.33 - Authenticated SQLi via Import Options | |
| CVE-2026-76551 | WP Import Export Lite < 3.9.33 - Authenticated RCE via Export Field PHP Function | |
| CVE-2026-74926 | MultiVendorX 5.0.0 - 5.0.15 - Subscriber+ Arbitrary Store Data and Ownership Overwrite via | |
| CVE-2026-76553 | WP Import Export Lite < 3.9.33 - Authenticated Arbitrary Directory Deletion via Template P | |
| CVE-2026-78472 | Ni WooCommerce Sales Report < 4.2.0 - Unauthenticated SQLi via 'sort' Parameter | |
| CVE-2026-82124 | Schema & Structured Data for WP & AMP < 1.66 - Unauthenticated Password-Protected Post Con | |
| CVE-2026-77702 | Eventin < 4.1.24 - Unauthenticated Ticket Price Rewrite via order_token | |
| CVE-2026-84829 | Optimole < 4.2.12 - Unauthenticated Stored XSS via Srcset Descriptor Parameter | |
| CVE-2026-84905 | Eventin < 4.1.24 - Contributor+ User Creation via Speaker Creation | |
| CVE-2026-84088 | Xpro Elementor Addons < 1.7.9 - Contributor+ Stored XSS via Interactive Circle Widget | |
| CVE-2026-82126 | Schema & Structured Data for WP & AMP 1.63 - 1.65 - Contributor+ Non-Public Post Content D | |
| CVE-2026-82125 | Schema & Structured Data for WP & AMP 1.46 - 1.65 - Unauthenticated Non-Public Comment Con | |
| CVE-2026-76550 | WP Import Export Lite < 3.9.34 - Authenticated RCE via Export Template Path Traversal |
Showing top 20 of 46 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Newsletter
-
CVE-2026-86824
Newsletter < 9.3.8 - Unauthenticated Subscriber PII Disclosu -
CVE-2026-66596
WordPress Newsletter plugin <= 9.3.3 - Cross Site Scripting -
CVE-2025-67999
WordPress Newsletter plugin <= 9.0.9 - SQL Injection vulnera -
CVE-2025-3582
Newsletter < 8.8.5 - Admin+ Stored XSS via Form -
CVE-2025-3581
Newsletter < 8.8.5 - Admin+ Stored XSS via Widget
Same vendor: Unknown
-
CVE-2026-87831
Checkout Field Manager < 7.9.7 - Subscriber+ Arbitrary Attac -
CVE-2026-87829
Checkout Field Manager < 7.9.7 - Subscriber+ Arbitrary Attac -
CVE-2026-91017
Robokassa payment gateway for Woocommerce < 1.8.9 - Unauthen -
CVE-2026-86801
To Do List Member 1.4 - 1.6 - Unauthenticated Stored XSS, Fi -
CVE-2026-87963
Yo 1.1 - 1.3.1 - Unauthenticated SQL Injection via username
V. Comments for CVE-2026-86823
No comments yet