CVE-2021-20789 is an open redirect vulnerability affecting GroupSession Free (v2.2.0 to <5.1.0), GroupSession byCloud (v3.0.3 to <5.1.0), and GroupSession ZION (v3.0.3 to <5.1.0). This flaw allows an unauthenticated attacker to redirect users to arbitrary malicious websites through a specially crafted URL, facilitating phishing attacks. The vulnerability has a CVSSv3.1 score of 6.1 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and resulting in low impact to confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.
| 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:N/UI:R/S:C/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.