Vulnerability Details : CVE-2021-20789
Open redirect 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 attacker to redirect a user to an arbitrary web site and conduct a phishing attack via a specially crafted URL.
Vulnerability category: Open redirect
Products affected by CVE-2021-20789
- cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*
- cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:*
- cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20789
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20789
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-20789
-
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20789
-
https://groupsession.jp/info/info-news/security202107
Vendor Advisory
-
https://jvn.jp/en/jp/JVN86026700/index.html
JVN#86026700: Multiple vulnerabilities in GroupSessionThird Party Advisory
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