Vulnerability Details : CVE-2021-20787
Cross-site scripting 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 inject an arbitrary script by sending a specially crafted request to a specific URL.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-20787
- 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-2021-20787
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20787
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
|
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
NIST |
CWE ids for CVE-2021-20787
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20787
-
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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