CVE-2025-66284
Medium
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductGroupsession
PublishedDec 12, 2025
First seenDec 12, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- groupsession groupsession5.7.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| groupsession groupsession | v < 5.7.1 | 5.7.1 |
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