CVE-2026-2892 Otter Blocks <= 3.1.4 - Improper Authorization to Unauthenticated Purchase Verification Bypass via Forged Cookie
Unauthenticated attackers can bypass purchase verification by forging a cookie to access gated content in the Otter Blocks WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2892?
CVE-2026-2892 is a high-severity authentication bypass vulnerability in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE, published on 30 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-285
Which versions are affected by CVE-2026-2892?
How do I fix CVE-2026-2892?
No fix has been published for CVE-2026-2892 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-2892 being exploited?
There is no known exploitation of CVE-2026-2892 in the wild and no public exploit code.
Sources
Also known as GHSA-h3rm-xcqx-mv7q.