---
id: CVE-2025-61950
title: >-
  In GroupSession, a Circular notice can be created with its memo field
  non-editable, but the authorization check is improperly implemented
summary: >-
  In GroupSession, a Circular notice can be created with its memo field
  non-editable, but the authorization check is improperly implemented. With some
  crafted request, a logged-in user may alter the memo field. The affected
  products and ve…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
vendor: groupsession
product: groupsession
affected:
  - groupsession < 5.3.0
  - groupsession < 5.3.2
  - groupsession < 5.3.3
patched:
  - groupsession 5.3.3
published: '2025-12-12'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-61950'
references:
  - url: 'https://groupsession.jp/info/info-news/security20251208'
    label: vultures@jpcert.or.jp
  - url: 'https://jvn.jp/en/jp/JVN19940619/'
    label: vultures@jpcert.or.jp
tags:
  - nvd
epss: 0.00189
epssPercentile: 0.07753
ingestedAt: '2026-10-07T20:46:46.891Z'
---

## Overview

In GroupSession, a Circular notice can be created with its memo field non-editable, but the authorization check is improperly implemented. With some crafted request, a logged-in user may alter the memo field. The affected products and versions are GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2.

## Affected

- `groupsession < 5.3.0`
- `groupsession < 5.3.2`
- `groupsession < 5.3.3`

## Remediation

Upgrade past the affected range:

- `groupsession 5.3.3`