{"id":"GHSA-p6h9-gw49-rqm4","summary":"markdown2 is vulnerable to cross-site scripting","details":"An issue was discovered in `markdown2` (aka python-markdown2) through 2.3.5. The `safe_mode` feature, which is supposed to sanitize user input against XSS, is flawed and does not escape the input properly. With a crafted payload, XSS can be triggered, as demonstrated by omitting the final `\u003e` character from an IMG tag.","aliases":["CVE-2018-5773","PYSEC-2018-13"],"modified":"2024-09-30T17:23:16.991720Z","published":"2018-07-12T20:29:21Z","database_specific":{"github_reviewed_at":"2020-06-16T21:48:21Z","nvd_published_at":null,"cwe_ids":["CWE-79"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-5773"},{"type":"WEB","url":"https://github.com/google/osv/issues/430"},{"type":"WEB","url":"https://github.com/trentm/python-markdown2/issues/285"},{"type":"WEB","url":"https://github.com/trentm/python-markdown2/pull/303"},{"type":"WEB","url":"https://github.com/trentm/python-markdown2/commit/1b1dcdd727c0ef03453b9f5ef5ae3679f1d72323"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-p6h9-gw49-rqm4"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/markdown2/PYSEC-2018-13.yaml"},{"type":"PACKAGE","url":"https://github.com/trentm/python-markdown2"},{"type":"WEB","url":"https://github.com/trentm/python-markdown2/blob/master/CHANGES.md#python-markdown2-236"}],"affected":[{"package":{"name":"markdown2","ecosystem":"PyPI","purl":"pkg:pypi/markdown2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.6"}]}],"versions":["1.0.1.10","1.0.1.11","1.0.1.12","1.0.1.13","1.0.1.14","1.0.1.15","1.0.1.16","1.0.1.17","1.0.1.18","1.0.1.19","1.0.1.6","1.0.1.7","1.0.1.8","1.0.1.9","1.1.0","1.1.1","1.2.0","1.3.0","1.3.1","1.4.0","1.4.1","1.4.2","2.0.0","2.0.1","2.1.0","2.2.0","2.2.1","2.2.2","2.2.3","2.3.0","2.3.1","2.3.2","2.3.3","2.3.4","2.3.5"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/07/GHSA-p6h9-gw49-rqm4/GHSA-p6h9-gw49-rqm4.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}