{"id":"CVE-2021-28977","aliases":["EUVD-2021-15624","GHSA-cpjh-h2xv-8gx6"],"status":"published","title":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments...","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00506,"percentile":0.4373,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-23T12:44:04Z","modified":"2026-10-20T10:53:42Z","products":[{"vendor":"get-simple","product":"getsimplecms"}],"references":[{"url":"https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1336","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28977"},{"url":"https://github.com/advisories/GHSA-cpjh-h2xv-8gx6"}],"sources":{"cve":[{"id":"CVE-2021-28977","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","status":"published","published":"2021-06-23T12:44:04Z","modified":"2024-08-03T21:55:12.26Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-15624","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","status":"published","published":"2021-06-23T12:44:04Z","modified":"2024-08-03T21:55:12Z","updated_at":"2026-11-03T03:24:45.541615Z"}],"ghsa":[{"id":"GHSA-cpjh-h2xv-8gx6","title":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments...","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","status":"published","published":"2022-05-24T19:06:01Z","modified":"2023-01-29T05:07:05Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:09.170985Z"}],"nvd":[{"id":"CVE-2021-28977","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","status":"published","published":"2021-06-23T13:15:08.18Z","modified":"2026-06-17T03:47:07.277Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/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":"2026-11-02T14:06:54.892562Z"}],"osv":[{"id":"CVE-2021-28977","description":"Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,","status":"published","published":"2021-06-23T13:15:08.18Z","modified":"2026-10-20T10:53:42.559864989Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"}]}}