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CVE-2026-19907— Shipo 1.6 - 1.8.0 - Authentication Bypass to Administrator

Quick assessment

Affected
shipo Shipo
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.

WordPress 的 Shipo 插件在 1.6 至 1.8.0 版本中存在身份验证绕过漏洞。该漏洞源于 函数直接解析 的值，并在未验证 Cookie 密码学签名的情况下即认证对应用户。此外，该函数本应限制仅对 路由生效，但攻击者可通过将 子字符串嵌入到无关 REST API 端点的查询字符串中，从而绕过此路由限制。这使得知道现有用户名（包括管理员）的未认证攻击者能够冒充该用户，并通过 REST API 执行受授权的操作，例如创建新的管理员账户。

CVSS 9.8 · Critical EPSS 0.47% · P41

Affected Version Matrix 1

VendorProduct Version RangeStatus
shipo Shipo 1.6≤ 1.8.0 affected
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I. Basic Information for CVE-2026-19907

Vulnerability Information
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Vulnerability Title
Shipo 1.6 - 1.8.0 - Authentication Bypass to Administrator
Source: CVE Program / CVE List V5
Vulnerability Description
The Shipo plugin for WordPress is vulnerable to Authentication Bypass in versions 1.6 through 1.8.0. This is due to the `authenticate_rest_user()` function parsing the `LOGGED_IN_COOKIE` value and authenticating the named user without verifying the cookie's cryptographic signature. The function's intended `/wp-json/shipo/` route restriction can also be bypassed by placing that substring in the query string of an unrelated REST endpoint. This makes it possible for unauthenticated attackers who know an existing username to impersonate that user, including an administrator, and perform authorized actions through the REST API, including creating another administrator account.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
shipo Shipo 1.6 ~ 1.8.0 -

II. Public POCs for CVE-2026-19907

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III. Intelligence Information for CVE-2026-19907

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Security Blog Posts for CVE-2026-19907 (1)

IV. Related Vulnerabilities

Same weakness: CWE-287