{"cve":"CVE-2025-8129","nvd":{"published":"2025-07-25T05:15:36.980","modified":"2026-06-17T10:06:21.673","status":"Analyzed","description":"A vulnerability, which was classified as problematic, was found in KoaJS Koa up to 3.0.0. Affected is the function back in the library lib/response.js of the component HTTP Header Handler. The manipulation of the argument Referrer leads to open redirect. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","score":2.0},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601"],"references":["https://github.com/koajs/koa/issues/1892","https://github.com/koajs/koa/issues/1892#issue-3213028583","https://vuldb.com/?ctiid.317514","https://vuldb.com/?id.317514","https://vuldb.com/?submit.619741"],"products":["koajs:koa"],"source":"nvd","synced_at":"2026-10-19T22:05:46.678065081+00:00"},"epss":{"cve":"CVE-2025-8129","score":0.00285,"percentile":0.21053,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jgmv-j7ww-jx2x","url":"https://osv.dev/vulnerability/GHSA-jgmv-j7ww-jx2x","summary":"Koa Open Redirect via Referrer Header (User-Controlled)","modified":"2025-07-30T14:14:46Z","packages":[{"ecosystem":"npm","name":"koa","purl":"pkg:npm/koa","ranges":[">=2.0.0 <2.16.2"],"fixed":["2.16.2"]},{"ecosystem":"npm","name":"koa","purl":"pkg:npm/koa","ranges":[">=3.0.0-alpha.0 <3.0.1"],"fixed":["3.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}