{"id":"CVE-2020-8127","aliases":["GHSA-6vwx-mwp8-fh44"],"url":"https://o3.security/vulnerability/CVE-2020-8127","summary":"Cross-site Scripting in reveal.js","details":"Insufficient validation in cross-origin communication (postMessage) in reveal.js version 3.9.1 and earlier allow attackers to perform cross-site scripting attacks.","published":"2020-02-28T20:15:11.537Z","modified":"2026-07-09T00:37:41.869873Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.01197,"percentile":0.65283,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"reveal.js","fixedVersion":"3.9.2"}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://hackerone.com/reports/691977"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:37:41.869873Z"}}