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CVE-2026-111699— Niefy wx-api through 0.8.2 Authentication Bypass via Unverified openid Cookie

Quick assessment

Affected
niefy wx-api
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.

Niefy wx-api 0.8.2 及以下版本存在身份验证绕过漏洞，允许未认证的攻击者通过向面向粉丝的控制器提供原始的 openid cookie 来冒充微信粉丝。若攻击者知晓受害者的 openid，即可调用 /wxUser/getUserInfo 和 /wxUserTags 接口，读取昵称、手机号、unionid 和标签，并添加或删除粉丝标签。

CVSS 4.8 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
niefy wx-api ≤ 0.8.2 affected
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I. Basic Information for CVE-2026-111699

Vulnerability Information
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Vulnerability Title
Niefy wx-api through 0.8.2 Authentication Bypass via Unverified openid Cookie
Source: CVE Program / CVE List V5
Vulnerability Description
Niefy wx-api through 0.8.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to impersonate WeChat fans by supplying a raw openid cookie to fan-facing controllers. Attackers knowing a victim's openid can call /wxUser/getUserInfo and /wxUserTags endpoints to read nickname, phone, unionid and tags, and add or remove fan tags.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
niefy wx-api 0 ~ 0.8.2 -

II. Public POCs for CVE-2026-111699

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111699

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Vendor Advisories for CVE-2026-111699 (1)

Proof of Concept for CVE-2026-111699 (1)

Security Blog Posts for CVE-2026-111699 (1)

Vendor Pages for CVE-2026-111699 (1)

IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-111699

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