Open redirect in Japan Total System products - CVE-2021-20789
Published: July 19, 2021
Vulnerability identifier: #VU54945
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20789
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data. 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.
Affected software
GroupSession Free edition
GroupSession byCloud
GroupSession ZION
GroupSession byCloud
GroupSession ZION
How to mitigate CVE-2021-20789
Install updates from vendor's website.
GroupSession Free edition - update to 5.1.0
GroupSession byCloud - update to 5.1.0
GroupSession ZION - update to 5.1.0
GroupSession byCloud - update to 5.1.0
GroupSession ZION - update to 5.1.0