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CVE-2026-109937— Otter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block

Quick assessment

Affected
Unknown Otter Blocks
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 3.2.3 版本之前，Otter Blocks WordPress 插件未对用户提供的返回 URL 是否属于本站进行验证，便将其用于构建 Stripe Checkout 会话的返回目的地。这使得未认证的攻击者能够将完成或取消结账的受害者重定向到任意外部 URL。

AI Predicted 5.4 Difficulty: Easy EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1566.002 · Spearphishing Link

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Otter Blocks < 3.2.3 affected
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I. Basic Information for CVE-2026-109937

Vulnerability Information
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Vulnerability Title
Otter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block
Source: CVE Program / CVE List V5
Vulnerability Description
The Otter Blocks WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.
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 Otter Blocks 0 ~ 3.2.3 -

II. Public POCs for CVE-2026-109937

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III. Intelligence Information for CVE-2026-109937

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Same Patch Batch · Unknown · 2026-10-18 · 13 CVEs total

CVE-2026-111041 AI Engine < 3.7.9 - Editor+ Arbitrary Post Modification via update_media_metadata and appr
CVE-2026-96534 Modern Events Calendar (Lite & Pro) < 7.37.0 - Subscriber+ SQLi via mec_fes_csv_export
CVE-2026-110976 AI Engine < 3.7.9 - Editor+ Arbitrary Post Deletion via reject_media
CVE-2026-110981 WP Photo Album Plus < 9.2.11.002 - Reflected XSS via 'wppa-cat' Parameter
CVE-2026-110070 Modern Events Calendar Lite < 7.36.4 - Subscriber+ Arbitrary Post Modification via IDOR
CVE-2026-110035 Salon Booking System < 10.31.11 - Subscriber+ Coupon Code Disclosure via Discounts REST Ro
CVE-2026-110069 Modern Events Calendar Lite < 7.37.0 - Subscriber+ Sensitive Data Disclosure via mec_event
CVE-2026-110033 Salon Booking System < 10.31.11 - Salon Staff+ Stored XSS and SSRF via Salon REST 'image_u
CVE-2026-87844 Product Designer <= 1.0.40 - Unauthenticated Design Template Data Injection
CVE-2026-110026 Tasty Recipes Lite 1.2 - 1.2.10 - Contributor+ Taxonomy Term Creation, Renaming and Deleti
CVE-2026-110032 Salon Booking System < 10.31.11 - Salon Staff+ Administrator Role Demotion via Customer Ed
CVE-2026-110031 Salon Booking System 10.17 - 10.31.10 - Salon Staff+ Privilege Escalation to Administrator

IV. Related Vulnerabilities

Same vendor: Unknown

V. Comments for CVE-2026-109937

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