{"id":"CVE-2020-26938","aliases":["EUVD-2022-6482","GHSA-4rg6-fm25-gc34"],"status":"published","title":"oauth2-server through 3.1.1 vulnerable to Open Redirect","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern (\"[a-zA-Z][a-zA-Z0-9+.-]+:\") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00986,"percentile":0.62832,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2022-08-29T20:51:04Z","modified":"2026-10-20T10:52:58Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"oauth2-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.1.1"}]}]},{"source":"osv","ecosystem":"npm","package":"oauth2-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"3.1.1"}]}]}],"products":[{"vendor":"oauth2-server_project","product":"oauth2-server"}],"references":[{"url":"https://github.com/oauthjs/node-oauth2-server/issues/637","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/validator/is.js#L12","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/grant-types/authorization-code-grant-type.js#L143","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://tools.ietf.org/html/rfc3986#section-3","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://tools.ietf.org/html/rfc6749#section-3.1.2","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26938","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4rg6-fm25-gc34"},{"url":"https://github.com/oauthjs/node-oauth2-server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-26938","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern (\"[a-zA-Z][a-zA-Z0-9+.-]+:\") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-29T20:51:04Z","modified":"2024-08-04T16:03:23.138Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2022-6482","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern (\"[a-zA-Z][a-zA-Z0-9+.-]+:\") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-29T20:51:04Z","modified":"2024-08-04T16:03:23Z","updated_at":"2026-11-03T03:07:13.515696Z"}],"ghsa":[{"id":"GHSA-4rg6-fm25-gc34","title":"oauth2-server through 3.1.1 vulnerable to Open Redirect","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the `redirect_uri` parameter received during the authorization and token request is checked against an incorrect URI pattern (`[a-zA-Z][a-zA-Z0-9+.-]+:`) before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-30T00:00:26Z","modified":"2023-01-27T05:02:39Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:36:19.144959Z"}],"nvd":[{"id":"CVE-2020-26938","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern (\"[a-zA-Z][a-zA-Z0-9+.-]+:\") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-29T21:15:08.863Z","modified":"2026-06-17T03:08:34.977Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:06:46.951463Z"}],"osv":[{"id":"CVE-2020-26938","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern (\"[a-zA-Z][a-zA-Z0-9+.-]+:\") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-29T21:15:08.863Z","modified":"2026-10-20T10:52:58.818428995Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"GHSA-4rg6-fm25-gc34","title":"oauth2-server through 3.1.1 vulnerable to Open Redirect","description":"In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the `redirect_uri` parameter received during the authorization and token request is checked against an incorrect URI pattern (`[a-zA-Z][a-zA-Z0-9+.-]+:`) before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.","status":"published","published":"2022-08-30T00:00:26Z","modified":"2023-11-08T04:03:20.585885Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:46:37.528068Z"}]}}