CVE-2021-31999
8.8 · HIGHOverview
CVE-2021-31999 is a high-severity vulnerability affecting rancher rancher. It was published on July 15, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster to act as others users in the cluster by forging the "Impersonate-User" or "Impersonate-Group" headers. This issue affects: Rancher versions prior to 2.5.9. Rancher versions prior to 2.4.16.
Remediation
Check the references section for vendor advisories and patches from rancher. Update rancher 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 |
|---|---|---|---|
| rancher | rancher | >= 0, < 2.4.16 | Affected |
Frequently Asked Questions
What is CVE-2021-31999?
CVE-2021-31999 is a high-severity vulnerability affecting rancher rancher. It was published on July 15, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-31999?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-31999?
Check the references section for vendor advisories and patches from rancher. Update rancher 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-2021-31999?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-31999 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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