Disclosure summary
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.
Source-reported weakness categories
CWE-79
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-53523
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| groupsession | groupsession | * {"versionEndExcluding":"5.3.0"} |
| groupsession | groupsession | * {"versionEndExcluding":"5.3.2"} |
| groupsession | groupsession | * {"versionEndExcluding":"5.3.3"} |
Original records & references
- NIST NVD record
- CVE Program record
- groupsession.jp — Vendor Advisory
- jvn.jp — Third Party Advisory
PUBLISHED 2025-12-12T00:16:05-05:00
MODIFIED 2026-10-07T16:10:01-04:00
INGESTED 2026-10-08T12:35:47-04:00