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CVE-2026-4945— Otter Blocks <= 3.1.7 - Missing Authorization to Unauthenticated Purchase Verification Bypass

Quick assessment

Affected
themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Otter Blocks – Gutenberg 插件（Gutenberg 编辑器和 FSE 的区块/页面构建器）在包括 3.1.7 在内的所有版本中，由于 函数中缺少对用户可控键值的验证，存在不安全直接对象引用（IDOR）漏洞。这使得未认证的攻击者能够通过独立操控 Stripe 结账 URL 中的 参数（使其与 参数脱钩），从而以较低成本购买低价商品，同时获得高级商品的使用权限。

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE ≤ 3.1.7 affected
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I. Basic Information for CVE-2026-4945

Vulnerability Information
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Vulnerability Title
Otter Blocks <= 3.1.7 - Missing Authorization to Unauthenticated Purchase Verification Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE 0 ~ 3.1.7 -

II. Public POCs for CVE-2026-4945

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III. Intelligence Information for CVE-2026-4945

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Patches & Fixes for CVE-2026-4945 (2)

Security Blog Posts for CVE-2026-4945 (1)

Vendor Pages for CVE-2026-4945 (2)

IV. Related Vulnerabilities

Same product: Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
Same vendor: themeisle
Same weakness: CWE-639

V. Comments for CVE-2026-4945

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