CVE-2025-61987

Q: How do I fix CVE-2025-61987?

Upgrade groupsession to 5.3.0 or later.

Q: Is CVE-2025-61987 being actively exploited?

Not that we know of. CVE-2025-61987 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.15% is the estimated probability that it will be exploited in the next 30 days. That is higher than 4% of all scored CVEs.

Q: How severe is CVE-2025-61987?

CVE-2025-61987 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2025-61987 affect?

Published advisories record a fix for groupsession (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

0.15%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

Related Vulnerabilities

Other CWE-1385 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-48849	Critical	9.4	0.9%	-	-
CVE-2025-24964	Critical	9.6	0.7%	-	Fix
CVE-2025-68930	High	7.1	0.5%	-	-
CVE-2023-0957	High	8.2	0.4%	-	Fix
CVE-2024-23168	Critical	9.8	0.4%	-	-
CVE-2014-125071	Medium	5.5	0.4%	-	Fix

Common questions

How do I fix CVE-2025-61987?

Upgrade groupsession to 5.3.0 or later.

Is CVE-2025-61987 being actively exploited?

Not that we know of. CVE-2025-61987 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.15% is the estimated probability that it will be exploited in the next 30 days. That is higher than 4% of all scored CVEs.

How severe is CVE-2025-61987?

CVE-2025-61987 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-61987 affect?

Published advisories record a fix for groupsession (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.