CVE-2026-111699

MEDIUM 4.8

Niefy wx-api through 0.8.2 Authentication Bypass via Unverified openid Cookie

CVSS Score

4.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	niefy
Product	wx-api
Published	Oct 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

niefy / wx-api

0 ≤ 0.8.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackmd.io: https://hackmd.io/@hieuPenguinnn/wx-api-cross-tenant-idor-and-unauth-fan-pii github.com: https://github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/modules/wx/controller/WxUserController.java#L31-L37 github.com: https://github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/modules/wx/controller/WxUserTagsController.java#L31-L45 github.com: https://github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/config/ShiroConfig.java#L43-L49 vulncheck.com: https://www.vulncheck.com/advisories/niefy-wx-api-through-0.8.2-authentication-bypass-via-unverified-openid-cookie

Credits

hieuPenguinnn