{"id":"CVE-2018-8899","aliases":["EUVD-2018-20507","GHSA-mvpr-3vvr-7vqx"],"status":"published","title":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect...","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","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":"2026-11-07","score":0.01215,"percentile":0.68744,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2018-03-22T05:00:00Z","modified":"2026-10-20T10:49:30Z","products":[{"vendor":"identityserver","product":"identityserver4"}],"references":[{"url":"https://github.com/IdentityServer/IdentityServer4/commit/21d0da227f50ac102de469a13bc5a15d2cc0f895","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/IdentityServer/IdentityServer4/releases/tag/2.1.3","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/IdentityServer/IdentityServer4/issues/2164","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/IdentityServer/IdentityServer4/releases/tag/1.5.3","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8899"},{"url":"https://github.com/advisories/GHSA-mvpr-3vvr-7vqx"}],"sources":{"cve":[{"id":"CVE-2018-8899","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","status":"published","published":"2018-03-22T05:00:00Z","modified":"2024-08-05T07:10:47.073Z","updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-20507","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","status":"published","published":"2018-03-22T05:00:00Z","modified":"2024-08-05T07:10:47Z","updated_at":"2026-11-03T02:40:01.4233Z"}],"ghsa":[{"id":"GHSA-mvpr-3vvr-7vqx","title":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect...","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","status":"published","published":"2022-05-14T03:31:07Z","modified":"2023-02-02T05:07:44Z","cvss":[{"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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:52:34.922323Z"}],"nvd":[{"id":"CVE-2018-8899","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","status":"published","published":"2018-03-22T05:29:00.287Z","modified":"2026-06-17T02:05:36.77Z","cvss":[{"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"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:04:24.264003Z"}],"osv":[{"id":"CVE-2018-8899","description":"IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.","status":"published","published":"2018-03-22T05:29:00.287Z","modified":"2026-10-20T10:49:30.170651978Z","cvss":[{"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"}],"updated_at":"2026-11-02T15:44:10.051046Z"}]}}