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

1) Open redirect

EUVDB-ID: #VU45657

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:a:ultimatemember:ultimate-member:1.0.0:*:*:*:*:wordpress:*:*
• cpe:2.3:a:ultimatemember:ultimate-member:1.0.10:*:*:*:*:wordpress:*:*
• cpe:2.3:a:ultimatemember:ultimate-member:1.0.15:*:*:*:*:wordpress:*:*

External links

https://wpvulndb.com/vulnerabilities/10346/
https://github.com/ultimatemember/ultimatemember/commit/c466e3d3d014a7e12850467372bdbabe6c474db2
https://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.