{"id":"CVE-2021-28121","aliases":["EUVD-2021-14822","GHSA-ppx8-69h9-fch2"],"status":"published","title":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","description":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","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":"2026-11-10","score":0.01669,"percentile":0.76976,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-08-12T22:00:07Z","modified":"2026-06-17T03:45:50Z","products":[{"vendor":"virtual_robots.txt_project","product":"virtual_robots.txt"}],"references":[{"url":"https://wordpress.org/plugins/pc-robotstxt/#developers","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28121"},{"url":"https://github.com/advisories/GHSA-ppx8-69h9-fch2"}],"sources":{"cve":[{"id":"CVE-2021-28121","description":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","status":"published","published":"2021-08-12T22:00:07Z","modified":"2024-08-03T21:33:17.406Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-14822","description":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","status":"published","published":"2021-08-12T22:00:07Z","modified":"2024-08-03T21:33:17Z","updated_at":"2026-11-03T03:24:47.80549Z"}],"ghsa":[{"id":"GHSA-ppx8-69h9-fch2","title":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","description":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","status":"published","published":"2022-05-24T19:11:09Z","modified":"2023-01-30T05:01:31Z","updated_at":"2026-11-02T14:46:25.989719Z"}],"nvd":[{"id":"CVE-2021-28121","description":"Virtual Robots.txt before 1.10 does not block HTML tags in the robots.txt field.","status":"published","published":"2021-08-12T22:15:07.69Z","modified":"2026-06-17T03:45:50.043Z","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"}],"updated_at":"2026-11-02T14:06:56.943671Z"}]}}