{"id":"CVE-2017-1000070","aliases":["EUVD-2021-2545","GHSA-jm34-xm8m-w958"],"status":"published","title":"Open Redirect in oauth2_proxy","description":"The Bitly oauth2_proxy in version 2.1 and earlier was affected by an open redirect vulnerability during the start and termination of the 2-legged OAuth flow. This issue was caused by improper input validation and a violation of RFC-6819","severity":{"version":"3.0","score":6.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00996,"percentile":0.62917,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-601"],"published":"2017-07-13T20:00:00Z","modified":"2026-10-24T10:47:28Z","fixes":[{"ecosystem":"Go","package":"github.com/bitly/oauth2_proxy","fixed_in":["2.2.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/bitly/oauth2_proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/bitly/oauth2_proxy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}]}],"products":[{"vendor":"oauth2_proxy_project","product":"oauth2_proxy"}],"references":[{"url":"https://github.com/bitly/oauth2_proxy/pull/359","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://tools.ietf.org/html/rfc6819#section-5.2.3.5","tags":["x_refsource_MISC","x_transferred","Technical Description","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-1000070","tags":["advisory"]},{"url":"https://github.com/bitly/oauth2_proxy/issues/228","tags":["web"]},{"url":"https://github.com/bitly/oauth2_proxy/commit/289a6ccf463a425c7606178c510fc5eeb9c8b050","tags":["web"]},{"url":"https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-1000070","tags":["web"]},{"url":"https://github.com/advisories/GHSA-jm34-xm8m-w958"}],"sources":{"cve":[{"id":"CVE-2017-1000070","description":"The Bitly oauth2_proxy in version 2.1 and earlier was affected by an open redirect vulnerability during the start and termination of the 2-legged OAuth flow. 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