Open redirect in Ultimate Member – User Profile & Membership Plugin for WordPress

1) Open redirect

EUVDB-ID: #VU45657

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data passed via the "redirect_to" GET parameter in the registration and login pages. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Ultimate Member – User Profile & Membership Plugin: 1.0.0 - 2.1.6

External links

http://wpvulndb.com/vulnerabilities/10346/
http://github.com/ultimatemember/ultimatemember/commit/c466e3d3d014a7e12850467372bdbabe6c474db2
http://wordpress.org/support/topic/redirect_to-in-querystring-vulnerability/

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.