CVE-2025-61987: groupsession — Fix

Description

GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-1385 CWE-1385

Affected Products

Vendor	Product	Versions
groupsession	groupsession	< 5.3.0
groupsession	groupsession	< 5.3.2
groupsession	groupsession	< 5.3.3

References

Advisories & Patches

https://groupsession.jp/info/info-news/security20251208

Other References

https://jvn.jp/en/jp/JVN19940619/

Frequently Asked Questions

What is CVE-2025-61987? +

GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-61987? +

CVE-2025-61987 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-61987? +

CVE-2025-61987 affects products from groupsession, specifically: groupsession. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-61987? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-61987