How severe is CVE-2025-61987?

CVE-2025-61987 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-61987 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61987?

CVE-2025-61987 primarily affects Groupsession. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-61987?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-61987 have an EU (EUVD) identifier?

Yes. CVE-2025-61987 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203021.

When was CVE-2025-61987 published?

CVE-2025-61987 was published on 2025-12-12 and last updated on 2026-06-17.

CVE-2025-61987

CVE-2025-61987 is a medium-severity vulnerability in Groupsession with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1385.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203021
Weakness: CWE-1385
Affected product: Groupsession
Published: 2025-12-12
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-61987?: CVE-2025-61987 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-61987 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61987?: CVE-2025-61987 primarily affects Groupsession. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-61987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61987 have an EU (EUVD) identifier?: Yes. CVE-2025-61987 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203021.
When was CVE-2025-61987 published?: CVE-2025-61987 was published on 2025-12-12 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*
cpe:2.3:a:groupsession:groupsession:*:*:*:*:zion:*:*:*
cpe:2.3:a:groupsession:groupsession:*:*:*:*:bycloud:*:*:*

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