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TI-2026-02486 Aliases CVE-2026-2892GHSA-h3rm-xcqx-mv7q

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

Priority LOW 39CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-285.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0032 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
themeisleOtter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSEup to 3.1.4—No fix listedCNA
  • Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE Vendorthemeisle Affected up to 3.1.4 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:themeisle:otter_blocks:*:*:*:*:*:*:*:*——themeisle
  • cpe:2.3:a:themeisle:otter_blocks:*:*:*:*:*:*:*:* Versions — — ·themeisle

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2892
  2. 2026-10-03 Alias added: GHSA-h3rm-xcqx-mv7q

References

Other 5

  • TI-2017-14315 WordPress Insert PHP Plugin < 3.3.1 PHP Code Injection via REST API CVSS 4.0CRITICAL 9.3
  • TI-2023-02146 Otter - Gutenberg Blocks < 2.2.6 - Author+ PHAR Deserialization CVSS 3.1HIGH 8.8
  • TI-2023-20819 WordPress Redirection for Contact Form 7 plugin <= 2.9.2 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
  • TI-2019-12631 A blind SSRF vulnerability exists in the Visualizer plugin before 3.3.1 for WordPress via… CVSS 3.1CRITICAL 10.0
  • TI-2023-02115 Product Addons & Fields for WooCommerce < 32.0.7 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
  • TI-2022-04265 RSS Aggregator by Feedzy < 4.1.1 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
See all 135 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences