{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/97676?format=json","vulnerability_id":"VCID-ez1c-daqb-wkg8","summary":"nosurf is cross-site request forgery (CSRF) protection middleware for Go. A vulnerability in versions prior to 1.2.0 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 CSRF checks and issue requests on user's behalf. Due 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. If 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`. A patch for the issue was released in nosurf 1.2.0. In 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).","aliases":[{"alias":"CVE-2025-46721"},{"alias":"GHSA-w9hf-35q4-vcjw"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/378903?format=json","purl":"pkg:golang/github.com/justinas/nosurf@1.2.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:golang/github.com/justinas/nosurf@1.2.0"}],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-46721","reference_id":"","reference_type":"","scores":[{"value":"0.00044","scoring_system":"epss","scoring_elements":"0.13899","published_at":"2026-06-13T12:55:00Z"},{"value":"0.00044","scoring_system":"epss","scoring_elements":"0.1387","published_at":"2026-06-14T12:55:00Z"},{"value":"0.00044","scoring_system":"epss","scoring_elements":"0.13901","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00044","scoring_system":"epss","scoring_elements":"0.13786","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-46721"},{"reference_url":"https://github.com/justinas/nosurf","reference_id":"","reference_type":"","scores":[{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/justinas/nosurf"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46721","reference_id":"","reference_type":"","scores":[{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-46721"},{"reference_url":"https://github.com/justinas/nosurf/commit/ec9bb776d8e5ba9e906b6eb70428f4e7b009feee","reference_id":"ec9bb776d8e5ba9e906b6eb70428f4e7b009feee","reference_type":"","scores":[{"value":"6","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-13T19:07:19Z/"}],"url":"https://github.com/justinas/nosurf/commit/ec9bb776d8e5ba9e906b6eb70428f4e7b009feee"},{"reference_url":"https://github.com/advisories/GHSA-rq77-p4h8-4crw","reference_id":"GHSA-rq77-p4h8-4crw","reference_type":"","scores":[{"value":"6","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-13T19:07:19Z/"}],"url":"https://github.com/advisories/GHSA-rq77-p4h8-4crw"},{"reference_url":"https://github.com/justinas/nosurf/security/advisories/GHSA-w9hf-35q4-vcjw","reference_id":"GHSA-w9hf-35q4-vcjw","reference_type":"","scores":[{"value":"6","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-13T19:07:19Z/"}],"url":"https://github.com/justinas/nosurf/security/advisories/GHSA-w9hf-35q4-vcjw"},{"reference_url":"https://github.com/justinas/nosurf-cve-2025-46721","reference_id":"nosurf-cve-2025-46721","reference_type":"","scores":[{"value":"6","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-13T19:07:19Z/"}],"url":"https://github.com/justinas/nosurf-cve-2025-46721"},{"reference_url":"https://github.com/justinas/nosurf/releases/tag/v1.2.0","reference_id":"v1.2.0","reference_type":"","scores":[{"value":"6","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"6.0","scoring_system":"cvssv4","scoring_elements":"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"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-13T19:07:19Z/"}],"url":"https://github.com/justinas/nosurf/releases/tag/v1.2.0"}],"weaknesses":[{"cwe_id":352,"name":"Cross-Site Request Forgery (CSRF)","description":"The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request."}],"exploits":[],"severity_range_score":"4.0 - 6.9","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-ez1c-daqb-wkg8"}