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CVE-2026-91830— Subscribe to Comments < 2.3.3 - Unauthenticated Subscription Management Key Disclosure via Forged Comment Cookie

Quick assessment

Affected
Unknown Subscribe to Comments
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 2.3.3 版本之前的"Subscribe to Comments"WordPress 插件，未对其用于识别评论者的可信 Cookie 进行签名或验证，这使得未经认证的攻击者能够泄露订阅者的管理密钥，并在不发出任何警报的情况下篡改该订阅者的订阅设置。

AI Predicted 6.5 Difficulty: Easy EPSS 0.14% · P3
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I. Basic Information for CVE-2026-91830

Vulnerability Information
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Vulnerability Title
Subscribe to Comments < 2.3.3 - Unauthenticated Subscription Management Key Disclosure via Forged Comment Cookie
Source: CVE Program / CVE List V5
Vulnerability Description
The Subscribe to Comments WordPress plugin before 2.3.3 does not sign or validate a cookie it trusts to identify a commenter, allowing unauthenticated attackers to disclose a subscriber's management key and silently alter that subscriber's subscriptions.
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 Subscribe to Comments 0 ~ 2.3.3 -

II. Public POCs for CVE-2026-91830

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-91830

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Same Patch Batch · Unknown · 2026-10-16 · 18 CVEs total

CVE-2026-110029 5.4 MEDIUM Squeeze < 1.8.1 - Subscriber+ Missing Authorization via squeeze_restore_attachment
CVE-2026-109930 5.3 MEDIUM MAIO < 7.3.22 - Unauthenticated Crawl Analytics Disclosure via Hardcoded API Key
CVE-2026-91833 WX Subscribe <= 1.2.1 - Unauthenticated SQLi via 'attach' Parameter
CVE-2026-92427 Coinsnap Bitcoin Crowdfunding <= 1.2.0 - Unauthenticated Payment Record Forgery via Webhoo
CVE-2026-74923 Document Gallery <= 5.1.1 - Unauthenticated Non-Public Attachment Disclosure via dg_genera
CVE-2026-110012 Salon Booking System < 10.31.3 - Subscriber+ Booking PII Disclosure via REST bookings/upco
CVE-2026-110013 Salon Booking System < 10.31.9 - Unauthenticated Salon REST API Access via Predictable Acc
CVE-2026-109982 MB Custom Post Types & Custom Taxonomies < 2.12.2 - Subscriber+ Missing Authorization via
CVE-2026-105973 Visual Form Builder <= 3.1 - Subscriber+ Arbitrary Form Field Reordering via Missing Autho
CVE-2026-105974 Visual Form Builder <= 3.1 - Subscriber+ Sensitive Data Disclosure via Dashboard Widget
CVE-2026-103696 Mobile Builder <= 1.4.2 - Unauthenticated SQLi via 'delivery_id' Parameter
CVE-2026-110039 Smush < 4.3.4 - Admin+ Network-Wide Plugin Settings Update on Multisite
CVE-2026-110135 OTP Login & Register Woocommerce < 2.7.3 - Unauthenticated Account Takeover via OTP Brute
CVE-2026-110179 affiliate-toolkit < 3.8.9 - Editor+ SQL Injection via orderby Parameter
CVE-2026-110014 Salon Booking System < 10.31.9 - Unauthenticated Booking Creation with Arbitrary Customer
CVE-2026-110015 Salon Booking System < 10.31.9 - Administrator Account Creation via CSRF
CVE-2026-110191 Product Delivery Date for WooCommerce – Lite < 3.3.2 - Contributor+ Order Information Disc

IV. Related Vulnerabilities

Same product: Subscribe to Comments
Same vendor: Unknown

V. Comments for CVE-2026-91830

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