CVE-2025-53523

Description

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.

CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

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-2025-53523? +

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. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-53523? +

CVE-2025-53523 has a CVSS v3.1 score of 5.4 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-2025-53523? +

CVE-2025-53523 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-2025-53523? +

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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