Medium severity · published Sep 7, 2026
CVE-2026-4945
Otter Blocks <= 3.1.7 - Missing Authorization to Unauthenticated Purchase Verification Bypass
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OB
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE · themeisle
through 3.1.7 · source: vendor
Affected product
OB
Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
themeisle
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4945
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4945
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L234
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L304
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/render/class-stripe-checkout-block.php#L69
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3496611/
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/7ecb9f61-68d5-4c70-8d7d-e4fb067fcff9?source=cve
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