GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and…
Priority LOW 35CWE-1385Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00151 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Japan Total System Co.,Ltd. | GroupSession Free edition | prior to ver5.3.0 | — | No fix listed | CNA |
| Japan Total System Co.,Ltd. | GroupSession byCloud | prior to ver5.3.3 | — | No fix listed | CNA |
| Japan Total System Co.,Ltd. | GroupSession ZION | prior to ver5.3.2 | — | No fix listed | CNA |
- GroupSession Free edition VendorJapan Total System Co.,Ltd. Affected prior to ver5.3.0 Fixed in — No fix listed CNA
- GroupSession byCloud VendorJapan Total System Co.,Ltd. Affected prior to ver5.3.3 Fixed in — No fix listed CNA
- GroupSession ZION VendorJapan Total System Co.,Ltd. Affected prior to ver5.3.2 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:* | before 5.3.0 | Vulnerable | Japan Total System Co.,Ltd. |
| cpe:2.3:a:groupsession:groupsession:*:*:*:*:zion:*:*:* | before 5.3.2 | Vulnerable | Japan Total System Co.,Ltd. |
| cpe:2.3:a:groupsession:groupsession:*:*:*:*:bycloud:*:*:* | before 5.3.3 | Vulnerable | Japan Total System Co.,Ltd. |
- cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:* Versions before 5.3.0 Vulnerable ·Japan Total System Co.,Ltd.
- cpe:2.3:a:groupsession:groupsession:*:*:*:*:zion:*:*:* Versions before 5.3.2 Vulnerable ·Japan Total System Co.,Ltd.
- cpe:2.3:a:groupsession:groupsession:*:*:*:*:bycloud:*:*:* Versions before 5.3.3 Vulnerable ·Japan Total System Co.,Ltd.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-61987
- 2026-10-03 Alias added: GHSA-r3gq-2jpg-6v2w
References
More Japan Total System Co.,Ltd. Groupsession vulnerabilities
- TI-2021-04088 Incorrect permission assignment in Japan Total System Co.,Ltd. GroupSession Free edition… CVSS 3.1HIGH 7.5
- TI-2021-04090 Path traversal in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession… CVSS 3.1MEDIUM 6.8
- TI-2017-01466 Information disclosure in Japan Total System Co.,Ltd. GroupSession CVSS 3.0MEDIUM 6.5
- TI-2025-38294 Authorization bypass in Japan Total System Co.,Ltd. GroupSession Free edition CVSS 4.0MEDIUM 5.3
- TI-2021-04089 Open redirect in Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession… CVSS 3.1MEDIUM 6.1
- TI-2021-04015 Open redirect in Japan Total System Co.,Ltd. GroupSession CVSS 3.1MEDIUM 6.1
Sources
- CVE-2025-61987 · CVE Program
- CVE-2025-61987 · NVD
- FIRST EPSS
- GHSA-r3gq-2jpg-6v2w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences