Otter Blocks <= 3.1.4 - Improper Authorization to Unauthenticated Purchase Verification Bypass via Forged Cookie

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-2892
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-30 14:16:29 UTC
Updated2026-04-30 14:52:54 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.000570000 probability, percentile 0.174330000 (date 2026-05-05)

Problem Types: CWE-285 | CWE-285 CWE-285 Improper Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Themeisle Otter Blocks Gutenberg Blocks Page Builder For Gutenberg Editor FSE affected 3.1.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-block-conditions... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/3443950f-1f94-4e0b-8906-1a9b9... [email protected] www.wordfence.com
plugins.trac.wordpress.org/changeset/3471326 [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Drew Webber (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-02-20T18:35:32.000ZVendor Notified
CNA2026-04-29T00:00:00.000ZDisclosed
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