What is CVE-2026-4945?

CVE-2026-4945 is a medium-severity vulnerability in Themeisle Otter Blocks – Gutenberg Blocks, Page Builder For Editor & Fse, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-09-07.

How severe is CVE-2026-4945?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Themeisle Otter Blocks – Gutenberg Blocks, Page Builder For Editor & Fse

CVE-2026-4945

The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.1.7 via the 'watch_checkout' function due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to pay for a lower-cost product while obtaining entitlement for a premium product by manipulating the product_id parameter independently of the price_id parameter in the Stripe checkout URL.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Themeisle Otter Blocks – Gutenberg Blocks, Page Builder For Editor & Fse

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-4945?: CVE-2026-4945 is a medium-severity vulnerability in Themeisle Otter Blocks – Gutenberg Blocks, Page Builder For Editor & Fse, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-09-07.
How severe is CVE-2026-4945?: Medium severity. CVSS v3 base score is 5.3 out of 10.