Nextend Social Login and Register <= 3.1.21 - Cross-Site Request Forgery to Unlink User Social Login
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 Nextend Social Login and Register plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1.21. This is due to missing or incorrect nonce validation on the 'unlinkUser' function. This makes it possible for unauthenticated attackers to unlink the user's social login via a forged request granted they can trick a site 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 |
|---|---|---|---|---|---|
| nextendweb | Nextend Social Login and Register | up to 3.1.21 | — | No fix listed | CNA |
- Nextend Social Login and Register Vendornextendweb Affected up to 3.1.21 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-13737
- 2026-10-03 Alias added: GHSA-f85c-2x25-hppv
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9c6b747e-d267-4fd3-a4fd-022aa657c796?source=cve
- https://plugins.trac.wordpress.org/browser/nextend-facebook-connect/tags/3.1.21/includes/provider.php#L772
- https://plugins.trac.wordpress.org/changeset/3404174/nextend-facebook-connect/trunk/includes/provider.php
More nextendweb vulnerabilities
- TI-2022-03102 Smart Slider 3 < 3.5.1.11 - PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2023-00625 Smart Slider 3 < 3.5.1.14 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2025-00900 Nextend Social Login Pro <= 3.1.16 - Authentication Bypass via Apple OAuth provider CVSS 3.1CRITICAL 9.8
- TI-2024-09179 Nextend Social Login Pro <= 3.1.14 - Authentication Bypass via WordPress.com OAuth provider CVSS 3.1CRITICAL 9.8
- TI-2026-26699 Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit CVSS 4.0CRITICAL 9.3
- TI-2022-22647 WordPress Smart Slider 3 Plugin <= 3.5.1.9 is vulnerable to PHP Object Injection CVSS 3.1HIGH 8.8
Sources
- CVE-2025-13737 · CVE Program
- CVE-2025-13737 · NVD
- FIRST EPSS
- GHSA-f85c-2x25-hppv · 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