CVE-2021-20788 json
Server-side request forgery (SSRF) vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0,…
published 2021-07-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8200
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
Server-side request forgery (SSRF) vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote authenticated attacker to conduct a port scan from the product and/or obtain information from the internal Web server.
Patch / fix
- groupsession groupsession 5.1.0
- groupsession groupsession_bycloud 5.1.0
- groupsession groupsession_zion 5.1.0
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
Affected products
- Japan Total System Co.,Ltd. GroupSession
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
groupsession.jp
/info/info-news/security202107
vendor-advisory
-
jvn.jp
/en/jp/JVN86026700/index.html
third-party-advisory
Sources
- CVE List CVE-2021-20788
- NVD CVE-2021-20788
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