PT-2026-36099 · WordPress · Otter Blocks

Drew Webber · Published 2026-04-30 · Updated 2026-05-05 · CVE-2026-2892

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Otter Blocks versions prior to 3.1.5

Description The plugin is subject to a purchase verification bypass. The get customer data() method relies on an unsigned o stripe data cookie to determine product ownership for unauthenticated users. Furthermore, the check purchase() method trusts this cookie data without performing server-side verification against the Stripe API for one-time payment mode purchases. This allows unauthenticated attackers to bypass content visibility restrictions by forging the o stripe data cookie using a target product ID, which is publicly available in the HTML source of the checkout block.

Recommendations Update to a version later than 3.1.4.

Fix

Improper Authorization

Weakness Enumeration

CWE-285

Related Identifiers

CVE-2026-2892

Affected Products

Otter Blocks

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-2892 · Security Note
• https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L260 · Note
• https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L284 · Note
• https://i.redd.it/v5zmm5aqqczg1.png · Reddit Post
• https://t.me/CVEtracker/52316 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/3443950f-1f94-4e0b-8906-1a9b9602a746?source=cve · Note
• https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-block-conditions.php#L274 · Note
• https://twitter.com/KaitanSecurity/status/2049858821510545884 · Twitter Post
• https://plugins.trac.wordpress.org/changeset/3471326 · Note