{"schema_version":"1.7.3","id":"GHSA-w9hf-35q4-vcjw","published":"2025-05-14T14:56:27Z","modified":"2026-02-04T03:18:59.066980Z","aliases":["CVE-2025-46721","GO-2025-3683"],"related":["CVE-2025-46721"],"summary":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","details":"### Impact\n\nThis vulnerability allows an attacker who controls content on the target site, or on a subdomain of the target site (either via XSS, or otherwise) to bypass Cross-Site Request Forgery checks and issue requests on user's behalf.\n\n### Details\n\nDue to misuse of the Go `net/http` library, nosurf categorizes all incoming requests as plain-text HTTP requests, in which case the `Referer` header is not checked to have the same origin as the target webpage.\n\nIf the attacker has control over HTML contents on either the target website (e.g. `example.com`), or on a website hosted on a subdomain of the target (e.g. `attacker.example.com`), they will also be able to manipulate cookies set for the target website. By acquiring the secret CSRF token from the cookie, or overriding the cookie with a new token known to the attacker, `attacker.example.com` is able to craft cross-site requests to `example.com`. \n\n### Patches\n\nA patch for the issue was released in nosurf 1.2.0.\n\n### Workarounds\n\nIn lieu of upgrading to a patched version of nosurf, users may additionally use another HTTP middleware to ensure that a non-safe HTTP request is coming from the same origin (e.g. by requiring a `Sec-Fetch-Site: same-origin` header in the request).\n\n### References\n\nhttps://github.com/advisories/GHSA-rq77-p4h8-4crw\nhttps://github.com/justinas/nosurf-cve-2025-46721\nhttps://www.cve.org/CVERecord?id=CVE-2025-46721\nhttps://github.com/justinas/nosurf/releases/tag/v1.2.0","affected":[{"package":{"name":"github.com/justinas/nosurf","ecosystem":"Go","purl":"pkg:golang/github.com/justinas/nosurf"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.2.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-w9hf-35q4-vcjw/GHSA-w9hf-35q4-vcjw.json"}}],"references":[{"type":"WEB","url":"https://github.com/justinas/nosurf/security/advisories/GHSA-w9hf-35q4-vcjw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46721"},{"type":"WEB","url":"https://github.com/justinas/nosurf/commit/ec9bb776d8e5ba9e906b6eb70428f4e7b009feee"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-rq77-p4h8-4crw"},{"type":"PACKAGE","url":"https://github.com/justinas/nosurf"},{"type":"WEB","url":"https://github.com/justinas/nosurf-cve-2025-46721"},{"type":"WEB","url":"https://github.com/justinas/nosurf/releases/tag/v1.2.0"}],"database_specific":{"cwe_ids":["CWE-352"],"github_reviewed":true,"github_reviewed_at":"2025-05-14T14:56:27Z","nvd_published_at":"2025-05-13T16:15:31Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}