#VU50098 Open redirect in OpenEMR and phpGACL - CVE-2020-13565

Vulnerability identifier: #VU50098

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2020-13565

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenEMR
Client/Desktop applications / Other client software
phpGACL
Web applications / Other software

Vendor: OpenEMR
phpgacl.sourceforge

Description

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

The vulnerability exists due to improper sanitization of user-supplied data in the return_page redirection functionality. 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 update from vendor's website.

Vulnerable software versions

OpenEMR: 5.0.2 - 6.0.0

phpGACL: 3.3.7

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1178

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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.