{"id":"CVE-2021-42654","aliases":["EUVD-2021-29617","GHSA-mpcp-76x2-2jrq"],"status":"published","title":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type ...","description":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0181,"percentile":0.78923,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2022-05-24T12:41:13Z","modified":"2026-06-17T04:09:55Z","products":[{"vendor":"sscms","product":"siteserver_cms"}],"references":[{"url":"https://github.com/siteserver/cms","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory"]},{"url":"https://github.com/siteserver/cms/issues/3236","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/siteserver/cms/releases/download/siteserver-dev-v5.0.92/siteserver_install.zip","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42654"},{"url":"https://github.com/advisories/GHSA-mpcp-76x2-2jrq"}],"sources":{"cve":[{"id":"CVE-2021-42654","description":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.","status":"published","published":"2022-05-24T12:41:13Z","modified":"2024-08-04T03:38:50.049Z","updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29617","description":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.","status":"published","published":"2022-05-24T12:41:13Z","modified":"2024-08-04T03:38:50Z","updated_at":"2026-11-03T03:24:15.755984Z"}],"ghsa":[{"id":"GHSA-mpcp-76x2-2jrq","title":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type ...","description":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.","status":"published","published":"2022-05-25T00:00:36Z","modified":"2023-01-30T05:05:52Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:47:22.488805Z"}],"nvd":[{"id":"CVE-2021-42654","description":"SiteServer CMS \u003c V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.","status":"published","published":"2022-05-24T13:15:07.543Z","modified":"2026-06-17T04:09:55.243Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:07:06.501652Z"}]}}