Description
Stored cross-site scripting vulnerabilities exist in GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1. 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.
References (2)
Core 2
Core References
Vendor Advisory
https://groupsession.jp/info/info-news/security20251208
Third Party Advisory
https://jvn.jp/en/jp/JVN19940619/
Scores
CVSS v3
5.4
EPSS
0.0014
EPSS Percentile
3.9%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
groupsession/groupsession
< 5.7.1 (3 CPE variants)
Published
Dec 12, 2025
Tracked Since
Feb 18, 2026