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CVE-2026-119166— Welcart e-Commerce <= 2.12.5 - Account Takeover via Insecure Direct Object Reference to Unauthenticated User Input via 'member[ID]' Parameter

Quick assessment

Affected
uscnanbu Welcart e-Commerce
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 Welcart 电子商务插件在所有 2.12.5 及更早版本中存在不安全的直接对象引用（IDOR）漏洞。该漏洞源于对由用户控制的 参数缺少验证，导致未认证攻击者可通过提供特定会员的数字 ID，覆盖该 Welcart 商店会员账户的电子邮件地址和密码，进而以该会员身份登录，实现完全账户接管。该漏洞利用的唯一认证屏障是 对非认证访客自动发布的“新会员注册表单”中输出的 nonce 值进行的校验，因此攻击者无需拥有现有账户、无需通过 WordPress 登录、也无需任何非默认配置即可利用此漏洞。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-119166

Vulnerability Information
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Vulnerability Title
Welcart e-Commerce <= 2.12.5 - Account Takeover via Insecure Direct Object Reference to Unauthenticated User Input via 'member[ID]' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Welcart e-Commerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.12.5 via the 'member[ID]' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to overwrite any existing Welcart shop-member account's email address and password by supplying that member's numeric ID, then authenticate as that member to achieve full account takeover. The only authentication barrier is a wp_verify_nonce() check against a nonce printed to every unauthenticated visitor on the auto-published New Enrollment Form, meaning no existing account, no WordPress login, and no non-default configuration is required to exploit this vulnerability.
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
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
uscnanbu Welcart e-Commerce 0 ~ 2.12.5 -

II. Public POCs for CVE-2026-119166

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III. Intelligence Information for CVE-2026-119166

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Other References for CVE-2026-119166 (7)

IV. Related Vulnerabilities

Same product: Welcart e-Commerce
Same vendor: uscnanbu
Same weakness: CWE-287