Auth bypass in 微信二维码登陆
CVE-2026-13597
The 微信二维码登陆 WordPress plugin through 1.3 does not properly validate WeChat webhook requests, as its signature check always passes, and it discloses the generated login code in the webhook response. This allows an unauthenticated attacker to forge a login event for any existing username, read the login code, and redeem it through an unauthenticated AJAX action to log in as that user, including an administrator, without a password.
Vulnerability class: Broken Authentication
EPSS: 0.003 (25.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Unknown 微信二维码登陆 — versions 0
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-13597?
- CVE-2026-13597 is a critical-severity vulnerability in 微信二维码登陆, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-07-27.
- How severe is CVE-2026-13597?
- Critical severity. CVSS v3 base score is 9.1 out of 10.