CVE-2025-53523

EUVD-2025-203026
Stored cross-site scripting vulnerabilities exist in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. 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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
jpcertCNA
5.4 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12%
Affected Products (NVD)
VendorProductVersion
groupsessiongroupsession
𝑥
< 5.3.0
groupsessiongroupsession
𝑥
< 5.3.2
groupsessiongroupsession
𝑥
< 5.3.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://groupsession.jp/info/info-news/security20251208
https://jvn.jp/en/jp/JVN19940619/