Is CVE-2025-61987 in the CISA KEV catalog?

No. CVE-2025-61987 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-61987?

CVE-2025-61987 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2025-61987?

CVE-2025-61987 has an EPSS score of 0.14% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-61987?

Upgrade groupsession to 5.3.0 or later.

CVE & CISA-KEV Catalog

CVE-2025-61987

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-1385

How to fix

Remediation Available

groupsessionNVD

Affected:< 5.3.0Fixed in:5.3.0CVE-2025-61987derived from NVD

Affected:< 5.3.2Fixed in:5.3.2CVE-2025-61987derived from NVD

Affected:< 5.3.3Fixed in:5.3.3CVE-2025-61987derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.14%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Vendor Advisory1

groupsession.jp

Third-Party Advisory1

jvn.jp

Embed a live status badge for CVE-2025-61987

Markdown

[![CVE-2025-61987](https://tridentstack.com/cve/badge/CVE-2025-61987.svg)](https://tridentstack.com/cve/CVE-2025-61987)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-61987"><img src="https://tridentstack.com/cve/badge/CVE-2025-61987.svg" alt="CVE-2025-61987"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-17.