{"id":"CVE-2021-42656","aliases":["GHSA-2xwp-7j3p-c78x"],"url":"https://o3.security/vulnerability/CVE-2021-42656","summary":"Cross site scripting in SiteServer CMS","details":"SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.","published":"2022-05-24T13:15:07.637Z","modified":"2026-08-07T17:03:06.838474Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"NuGet","name":"SSCMS","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/siteserver/cms"},{"type":"REPORT","url":"https://github.com/siteserver/cms/issues/3238"},{"type":"FIX","url":"https://github.com/siteserver/cms/releases/download/siteserver-v6.15.51/siteserver_install.zip"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T17:03:06.838474Z"}}