What’s Vulnerable › Vulnerabilities
CVE-2026-109937: Otter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-18 · updated 2026-10-19
- Weakness: CWE-601
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.
Affected products
- themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE: before 3.2.3 — fixed in 3.2.3
How to fix
Upgrade to a fixed version: themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE 3.2.3. Check the vendor advisory for mitigations.
References
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