CVE-2025-66284: groupsession before 5.7.1 (exclusive); +3 more affected products

Affected technology

groupsession · before 5.7.1 (exclusive)
groupsession

GroupSession Free edition · prior to ver5.7.1
Japan Total System Co.,Ltd.

GroupSession byCloud · prior to ver5.7.1
Japan Total System Co.,Ltd.

GroupSession ZION · prior to ver5.7.1
Japan Total System Co.,Ltd.

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · Active user interaction

What an attacker can do

A logged-in user can prepare a malicious page or URL, and an arbitrary script may be executed on the web browser when another user accesses it. Vendor/CNA’s CVSS 4.0 assessment (base score 4.8/10) rates confidentiality, integrity and availability impact as none.