CVE-2021-20787 is a cross-site scripting (XSS) vulnerability affecting GroupSession Free (versions 2.2.0 to prior to 5.1.0), GroupSession byCloud (versions 3.0.3 to prior to 5.1.0), and GroupSession ZION (versions 3.0.3 to prior to 5.1.0). This medium-severity vulnerability (CVSS 4.8) allows a remote attacker to inject arbitrary scripts by sending a specially crafted request to a specific URL, requiring high privileges and user interaction. While it has a low EPSS score and FAUCET Risk Score, indicating a low likelihood of exploitation, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.20, < 5.1.0CPE matchmatch criteria | cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:* | ||
>= 3.0.3, < 5.1.0CPE matchmatch criteria | cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:* | ||
>= 3.0.3, < 5.1.0CPE matchmatch criteria | cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.