CVE-2026-2892 json
Otter Blocks <= 3.1.4 - Improper Authorization to Unauthenticated Purchase Verification Bypass via Forged Cookie
published 2026-04-30 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-26373
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
Classification
- Weakness
-
- CWE-285 Improper Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/3443950f-1f94-4e0b-8906-1a9b9602a746?source=cve
- plugins.trac.wordpress.org /browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L260
- plugins.trac.wordpress.org /browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L284
- plugins.trac.wordpress.org /browser/otter-blocks/trunk/inc/plugins/class-block-conditions.php#L274
- plugins.trac.wordpress.org /changeset/3471326/
Sources
- CVE List CVE-2026-2892
- NVD CVE-2026-2892
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.