{"id":"CVE-2021-39318","aliases":["EUVD-2021-25679","GHSA-777j-8c2c-w27p"],"status":"published","title":"H5P CSS Editor \u003c= 1.0 Reflected Cross-Site Scripting","description":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p-css-file parameter found in the ~/h5p-css-editor.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00782,"percentile":0.5641,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-12-14T15:50:11Z","modified":"2026-06-17T04:03:32Z","products":[{"vendor":"h5p css editor","product":"h5p css editor"},{"vendor":"h5p-css-editor_project","product":"h5p-css-editor"}],"references":[{"url":"https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39318","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://plugins.trac.wordpress.org/browser/h5p-css-editor/tags/1.0/h5p-css-editor.php#L50","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39318"},{"url":"https://github.com/advisories/GHSA-777j-8c2c-w27p"}],"sources":{"cve":[{"id":"CVE-2021-39318","title":"H5P CSS Editor \u003c= 1.0 Reflected Cross-Site Scripting","description":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p-css-file parameter found in the ~/h5p-css-editor.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.","status":"published","published":"2021-12-14T15:50:11.666Z","modified":"2025-02-13T20:47:02.487Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:09.175141Z"}],"euvd":[{"id":"EUVD-2021-25679","description":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p-css-file parameter found in the ~/h5p-css-editor.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.","status":"published","published":"2021-12-14T15:50:11Z","modified":"2025-02-13T20:47:02Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:53:30.772675Z"}],"ghsa":[{"id":"GHSA-777j-8c2c-w27p","title":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p...","description":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p-css-file parameter found in the ~/h5p-css-editor.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.","status":"published","published":"2021-12-15T00:00:54Z","modified":"2023-02-01T05:07:04Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:50:28.399252Z"}],"nvd":[{"id":"CVE-2021-39318","description":"The H5P CSS Editor WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the h5p-css-file parameter found in the ~/h5p-css-editor.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.0.","status":"published","published":"2021-12-14T16:15:08.843Z","modified":"2026-06-17T04:03:32.5Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}