CVE-2021-41101
lowpriority · track · 14EPSS 0.007 · 53 %ileEUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.5–5.7
weaknesses
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affected products (2)
Products and version ranges known to be affected.
also known as (2)
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sources
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references (5)
External citations — patches, advisories, analysis.
- https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66pcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-41101cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021100109cnnvd
- https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66penisa_euvd
- https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66pThird Party Advisorynvd
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