{"id":"CVE-2020-11888","aliases":["GHSA-fv3h-8x5j-pvgq","PYSEC-2020-65"],"url":"https://o3.security/vulnerability/CVE-2020-11888","summary":"XSS in python-markdown2","details":"python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \\w+ match succeeds. For example, an attack might use elementname@ or elementname- with an onclick attribute.","published":"2020-04-20T16:15:14.430Z","modified":"2026-07-08T20:30:15.900542Z","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":0.01884,"percentile":0.77617,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"markdown2","fixedVersion":"2.3.9"}],"fix":null,"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00031.html"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00035.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XOAIRJJCZNJUALXDHSIGH5PS2H63A3J/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQLRBGRVRRZK7P5SFL2MNGXFX37YHJAV/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN6QSHRFZXRQAYZJQ4MOW5MKIXBYOMED/"},{"type":"EVIDENCE","url":"https://github.com/trentm/python-markdown2/issues/348"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:30:15.900542Z"}}