{"id":"CVE-2021-42656","aliases":["EUVD-2022-2075","GHSA-2xwp-7j3p-c78x"],"status":"published","title":"Cross site scripting in SiteServer CMS","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00712,"percentile":0.54024,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2022-05-24T13:00:39Z","modified":"2026-10-20T10:55:01Z","affected":[{"source":"ghsa","ecosystem":"NuGet","package":"SSCMS","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.15.51"}]}]},{"source":"osv","ecosystem":"NuGet","package":"SSCMS","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.15.51"}]}],"versions":["1.0.0-preview4"]}],"products":[{"vendor":"sscms","product":"siteserver_cms"}],"references":[{"url":"https://github.com/siteserver/cms","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","package"]},{"url":"https://github.com/siteserver/cms/releases/download/siteserver-v6.15.51/siteserver_install.zip","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/siteserver/cms/issues/3238","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42656","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2xwp-7j3p-c78x"}],"sources":{"cve":[{"id":"CVE-2021-42656","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-24T13:00:39Z","modified":"2024-08-04T03:38:50.071Z","updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2022-2075","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-24T13:00:39Z","modified":"2024-08-04T03:38:50Z","updated_at":"2026-11-03T03:24:15.299027Z"}],"ghsa":[{"id":"GHSA-2xwp-7j3p-c78x","title":"Cross site scripting in SiteServer CMS","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-25T00:00:37Z","modified":"2023-01-27T05:02:53Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:36:20.144464Z"}],"nvd":[{"id":"CVE-2021-42656","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-24T13:15:07.637Z","modified":"2026-06-17T04:09:55.487Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"CVE-2021-42656","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-24T13:15:07.637Z","modified":"2026-10-20T10:55:01.071447874Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.557945Z"},{"id":"GHSA-2xwp-7j3p-c78x","title":"Cross site scripting in SiteServer CMS","description":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","status":"published","published":"2022-05-25T00:00:37Z","modified":"2023-11-08T04:07:07.317998Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:35.050232Z"}]}}