CVE-2025-65120

Unknown Unknown - Not Provided

Reflected XSS in GroupSession Versions Prior to

Publication date: 2025-12-12

Last updated on: 2026-02-17

Assigner: JPCERT/CC

Description

Reflected cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of the user.

CVSS Scores

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Meta Information

Published

2025-12-12

Last Modified

2026-02-17

Generated

2026-07-06

AI Q&A

2025-12-12

EPSS Evaluated

2026-07-05

NVD

CVE-2025-65120

EUVD

EUVD-2025-203023

Affected Vendors & Products

Vendor	Product	Version / Range
groupsession	groupsession	to 5.7.1 (exc)
groupsession	groupsession	to 5.7.1 (exc)
groupsession	groupsession	to 5.7.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is a reflected cross-site scripting (XSS) issue in GroupSession software versions prior to 5.7.1. It allows an attacker to craft a malicious page or URL that, when accessed by a user, executes arbitrary scripts in the user's web browser.

Impact Analysis

The vulnerability can lead to execution of arbitrary scripts in a user's browser, potentially allowing attackers to steal sensitive information, hijack user sessions, or perform actions on behalf of the user without their consent.

Mitigation Strategies

Users are advised to update GroupSession to the latest versions (at least version 5.7.1 or later) as provided by the vendor to mitigate this reflected cross-site scripting vulnerability. [2]

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