{"cve":"CVE-2020-11888","nvd":{"published":"2020-04-20T16:15:14.430","modified":"2026-06-17T02:50:59.240","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00031.html","http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00035.html","https://github.com/trentm/python-markdown2/issues/348","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XOAIRJJCZNJUALXDHSIGH5PS2H63A3J/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQLRBGRVRRZK7P5SFL2MNGXFX37YHJAV/"],"products":["python-markdown2_project:python-markdown2"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-11888","score":0.01932,"percentile":0.80026,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-fv3h-8x5j-pvgq","url":"https://osv.dev/vulnerability/GHSA-fv3h-8x5j-pvgq","summary":"XSS in python-markdown2","modified":"2024-09-24T20:33:18.866718Z","packages":[{"ecosystem":"PyPI","name":"markdown2","purl":"pkg:pypi/markdown2","ranges":["<2.3.9"],"fixed":["2.3.9"]}]},{"id":"PYSEC-2020-65","url":"https://osv.dev/vulnerability/PYSEC-2020-65","summary":"","modified":"2023-11-08T04:02:07.747183Z","packages":[{"ecosystem":"PyPI","name":"markdown2","purl":"pkg:pypi/markdown2","ranges":["<2.3.9"],"fixed":["2.3.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}