Server-Side Request Forgery (SSRF) in Japan Total System products - CVE-2021-20788
Published: July 19, 2021
Vulnerability identifier: #VU54942
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2021-20788
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input in the bookmark function. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Affected software
GroupSession Free edition
GroupSession byCloud
GroupSession ZION
GroupSession byCloud
GroupSession ZION
How to mitigate CVE-2021-20788
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