Medium severity · published Nov 28, 2025
CVE-2025-13737
Nextend Social Login and Register <= 3.1.21 - Cross-Site Request Forgery to Unlink User Social Login
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextend Social Login and Register · nextendweb
through 3.1.21 · source: vendor
Affected product
NS
Nextend Social Login and Register
nextendweb
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13737
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13737
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/nextend-facebook-connect/tags/3.1.21/includes/provider.php#L772
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3404174/nextend-facebook-connect/trunk/includes/provider.php
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/9c6b747e-d267-4fd3-a4fd-022aa657c796?source=cve
More from Nextend Social Login and Register
5.4
CVE-2024-1775
Nextend Social Login and Register <= 3.1.12 - Reflected Self-Based Cross-Site Scripting via error_description