Cross-site request forgery in Admin Custom Login plugin for WordPress

1) Cross-site request forgery

EUVDB-ID: #VU56038

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-34628

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in the "loginbgSave" action in the ~/includes/Login-form-setting/Login-form-background.php file. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Admin Custom Login: 1.0 - 3.2.7

External links

http://plugins.trac.wordpress.org/browser/admin-custom-login/tags/3.2.7/includes/login-form-setting/login-form-background.php#L686
http://www.wordfence.com/vulnerability-advisories/#CVE-2021-34628

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.