CVE-2021-20789
6.1 · MEDIUMOverview
CVE-2021-20789 is a medium-severity vulnerability affecting groupsession groupsession. It was published on July 30, 2021 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from groupsession. Update groupsession to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| groupsession | groupsession | >= 2.20, < 5.1.0 | Affected |
| groupsession | groupsession_bycloud | >= 3.0.3, < 5.1.0 | Affected |
| groupsession | groupsession_zion | >= 3.0.3, < 5.1.0 | Affected |
Frequently Asked Questions
What is CVE-2021-20789?
CVE-2021-20789 is a medium-severity vulnerability affecting groupsession groupsession. It was published on July 30, 2021 and has a CVSS 3.1 base score of 6.1 (MEDIUM).
How severe is CVE-2021-20789?
This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20789?
Check the references section for vendor advisories and patches from groupsession. Update groupsession to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20789?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20789 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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