CVE-2021-41101
5.7 · MEDIUMOverview
CVE-2021-41101 is a medium-severity vulnerability affecting wire wire_server. It was published on September 30, 2021 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
wire-server is an open-source back end for Wire, a secure collaboration platform. Before version 2.106.0, the CORS ` Access-Control-Allow-Origin ` header set by `nginz` is set for all subdomains of `.wire.com` (including `wire.com`). This means that if somebody were to find an XSS vector in any of the subdomains, they could use it to talk to the Wire API using the user's Cookie. A patch does not exist, but a workaround does. To make sure that a compromise of one subdomain does not yield access to the cookie of another, one may limit the `Access-Control-Allow-Origin` header to apps that actually require the cookie (account-pages, team-settings and the webapp).
Remediation
Check the references section for vendor advisories and patches from wire. Update wire_server 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 |
|---|---|---|---|
| wire | wire_server | >= 0, < 2.106.0 | Affected |
Frequently Asked Questions
What is CVE-2021-41101?
CVE-2021-41101 is a medium-severity vulnerability affecting wire wire_server. It was published on September 30, 2021 and has a CVSS 3.1 base score of 5.7 (MEDIUM).
How severe is CVE-2021-41101?
This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-41101?
Check the references section for vendor advisories and patches from wire. Update wire_server 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-2021-41101?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-41101 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
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