CVE-2021-20874 json
Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud…
published 2021-12-24 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8283
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
Incorrect permission assignment for critical resource vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to access arbitrary files on the server and obtain sensitive information via unspecified vectors.
Exploit prediction
1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION
Classification
- Weakness
-
- CWE-732 Incorrect Permission Assignment for Critical Resource
References
-
groupsession.jp
/info/info-news/security20211220
vendor-advisory
-
jvn.jp
/en/jp/JVN79798166/index.html
third-party-advisory
Sources
- CVE List CVE-2021-20874
- NVD CVE-2021-20874
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