Auth bypass in Niefy Wx-Api
CVE-2026-111699
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/wx-api-cross-tenant-idor-and-unauth-fan-pii (third-party-advisory)
- github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/modules/wx/co… (technical-description)
- github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/modules/wx/co… (technical-description)
- github.com/niefy/wx-api/blob/0.8.2/src/main/java/com/github/niefy/config/ShiroC… (technical-description)
- www.vulncheck.com/advisories/niefy-wx-api-through-0.8.2-authentication-bypass-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111699?
- CVE-2026-111699 is a medium-severity vulnerability in Niefy Wx-Api, classified under Missing Authentication for Critical Function. CVSS score: 4.8/10. Published 2026-10-16.
- How severe is CVE-2026-111699?
- Medium severity. CVSS v3 base score is 4.8 out of 10.