login_register <= 1.2.0 - Cross-Site Request Forgery to Stored Cross-Site Scripting
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-352.
Summary
The login_register plugin for WordPress is vulnerable to Cross-Site Request Forgery to Stored Cross-Site Scripting in all versions up to, and including, 1.2.0. This is due to missing nonce validation on the settings page and insufficient input sanitization and output escaping on the 'login_register_login_post' parameter. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page via a forged request granted they can trick an administrator into performing an action such as clicking on a link.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| frankkoenen | Plugin Name: login_register | up to 1.2.0 | — | No fix listed | CNA |
- Plugin Name: login_register Vendorfrankkoenen Affected up to 1.2.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1503
- 2026-10-03 Alias added: GHSA-p352-rg87-vcp2
References
Other 4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8c82d209-3c69-4d6e-a129-d519f6601540?source=cve
- https://plugins.trac.wordpress.org/browser/login-register/tags/1.2.0/login_register_admin.php#L12
- https://plugins.trac.wordpress.org/browser/login-register/tags/1.2.0/login_register_admin.php#L14
- https://plugins.trac.wordpress.org/browser/login-register/tags/1.2.0/login_register_admin.php#L69
More frankkoenen vulnerabilities
- TI-2025-16434 WordPress ldap_login_password_and_role_manager plugin <= 1.0.12 - CSRF to Stored XSS vulnerability CVSS 3.1HIGH 7.1
Sources
- CVE-2026-1503 · CVE Program
- CVE-2026-1503 · NVD
- FIRST EPSS
- GHSA-p352-rg87-vcp2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences