Vulnerability 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).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wire | Wire Server | < 2.106.0 |
Related Weaknesses (CWE)
References
- https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66pThird Party Advisory
- https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66pThird Party Advisory
FAQ
What is CVE-2021-41101?
CVE-2021-41101 is a vulnerability with a CVSS score of 5.7 (MEDIUM). 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 `....
How severe is CVE-2021-41101?
CVE-2021-41101 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41101?
Check the references section above for vendor advisories and patch information. Affected products include: Wire Wire Server.