CVE-2026-13597 WordPress.org CVE debrief

Who should care

Users of the 微信二维码登陆 WordPress plugin, especially those with administrator privileges, should be aware of this vulnerability and take immediate action to protect their sites. This vulnerability 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. Site administrators should review their plugin versions and update to a patched version if available.

Technical summary

The 微信二维码登陆 WordPress plugin through version 1.3 does not properly validate WeChat webhook requests. The plugin's 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. The vulnerability is caused by the plugin's improper validation of WeChat webhook requests, which allows an attacker to exploit the vulnerability without authentication.

Defensive priority

High

Recommended defensive actions

• Update the 微信二维码登陆 WordPress plugin to a version that properly validates WeChat webhook requests and fixes the signature check vulnerability.
• Implement additional security measures, such as monitoring for suspicious login attempts and restricting access to sensitive areas of the site.
• Consider using a Web Application Firewall (WAF) to detect and prevent exploitation attempts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record was published on 2026-07-27T07:16:25.127Z and has not been modified since then. The NVD entry is currently in the 'Received' status. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The 微信二维码登陆 WordPress plugin through version 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.

Official resources