CVE-2021-41101: CORS `Access-Control-Allow-Origin` settings are too lenient
First published: Thu Sep 30 2021(Updated: )
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).
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Wire | <2.106.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-41101.
What is the severity of CVE-2021-41101?
The severity of CVE-2021-41101 is medium with a CVSS score of 5.7.
What is the affected software?
The affected software is Wire Server before version 2.106.0.
What is the Common Weakness Enumeration (CWE) ID for this vulnerability?
The CWE ID for this vulnerability is CWE-79.
Is there a reference for this vulnerability?
Yes, you can find more information about the vulnerability in the Wire Server security advisory on GitHub: https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/weakness
- agent/title
- agent/last-modified-date
- agent/severity
- agent/references
- agent/description
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/wire
- canonical/wire