Hosts listed in TrustedOrigins implicitly allow requests from the corresponding HTTP origins, allowing network MitMs to perform CSRF attacks. After the CVE-2025-24358 fix, a network attacker that places a form at http://example.com can't get it to submit to https://example.com because the Origin header is checked with sameOrigin against a synthetic URL. However, if a host is added to TrustedOrigins, both its HTTP and HTTPS origins will be allowed, because the schema of the synthetic URL is ignored and only the host is checked. For example, if an application is hosted on https://example.com and adds example.net to TrustedOrigins, a network attacker can serve a form at http://example.net to perform the attack. Applications should migrate to net/http.CrossOriginProtection, introduced in Go 1.25. If that is not an option, a backport is available as a module at filippo.io/csrf, and a drop-in replacement for the github.com/gorilla/csrf API is available at filippo.io/csrf/gorilla.
Metrics
Affected Vendors & Products
References
History
Fri, 29 Aug 2025 19:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-346 | |
Metrics |
cvssV3_1
|
Fri, 29 Aug 2025 16:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | Hosts listed in TrustedOrigins implicitly allow requests from the corresponding HTTP origins, allowing network MitMs to perform CSRF attacks. After the CVE-2025-24358 fix, a network attacker that places a form at http://example.com can't get it to submit to https://example.com because the Origin header is checked with sameOrigin against a synthetic URL. However, if a host is added to TrustedOrigins, both its HTTP and HTTPS origins will be allowed, because the schema of the synthetic URL is ignored and only the host is checked. For example, if an application is hosted on https://example.com and adds example.net to TrustedOrigins, a network attacker can serve a form at http://example.net to perform the attack. Applications should migrate to net/http.CrossOriginProtection, introduced in Go 1.25. If that is not an option, a backport is available as a module at filippo.io/csrf, and a drop-in replacement for the github.com/gorilla/csrf API is available at filippo.io/csrf/gorilla. | |
Title | Improper validation of TrustedOrigins allows CSRF attacks in github.com/gorilla/csrf | |
References |
|

Status: PUBLISHED
Assigner: Go
Published: 2025-08-29T15:55:08.936Z
Updated: 2025-08-29T18:23:11.763Z
Reserved: 2025-05-13T23:31:29.597Z
Link: CVE-2025-47909

Updated: 2025-08-29T18:22:37.671Z

Status : Awaiting Analysis
Published: 2025-08-29T16:15:35.990
Modified: 2025-08-29T19:15:37.433
Link: CVE-2025-47909

No data.