The Otter Blocks plugin for WordPress is vulnerable to Purchase Verification Bypass in all versions up to, and including, 3.1.4. This is due to the 'get_customer_data' method relying on an unsigned 'o_stripe_data' cookie to determine Stripe product ownership for unauthenticated users. The 'check_purchase' method trusts this cookie data without performing server-side verification against the Stripe API for one-time 'payment' mode purchases. This makes it possible for unauthenticated attackers to bypass Stripe purchase-gated content visibility conditions by forging the 'o_stripe_data' cookie with a target product ID, which is publicly exposed in the checkout block's HTML source.
CVE-2026-2892 is a high severity with CVSS 7.5 Vulnerability issue affecting the Plugin Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE. It affects Versions up to 3.1.4 and is fixed in 3.1.5.
CVE-2026-2892 is tracked for the Plugin Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE as high severity with CVSS 7.5. The affected range is Versions up to 3.1.4. Update Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE to 3.1.5 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
otter-blocks
View on wordpress.org
|
| CVE | CVE-2026-2892 |
| Patched Versions |
3.1.5
|
| Affected Versions |
Versions up to 3.1.4
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Otter - Gutenberg Blocks <= 2.2.5 - Authenticated (Author+) PHAR Deserialization
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 3.0.4 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'titleTag'
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.8 - Authenticated (Author+) Limited File Upload to Stored Cross-Site Scripting
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Block Attributes
Otter Blocks <= 2.6.5 - Authenticated (Contributor+) Stored Cross-Site Scripting
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.5 - Authenticated (Contributor+) Stored Cross-Site Scripting
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 2.6.4 - Authenticated (Contributor+) Stored Cross-Site Scripting
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