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Database

Reflected cross-site scripting (XSS) In markdown2

Description

markdown2 is vulnerable to cross-site scripting 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 > character from an IMG tag.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Package
Affected version
Patched versions

Aliases

1. CVE-2018-57732. NVD-2018-57733. OSV-2018-57734. GHSA-p6h9-gw49-rqm45. GCVE-2018-5773

References

1. https://github.com/google/osv/issues/4302. https://github.com/trentm/python-markdown2/issues/2853. https://github.com/trentm/python-markdown2/pull/3034. https://github.com/trentm/python-markdown2/commit/1b1dcdd727c0ef03453b9f5ef5ae3679f1d723235. https://github.com/pypa/advisory-database/tree/main/vulns/markdown2/PYSEC-2018-13.yaml6. https://github.com/trentm/python-markdown2/blob/master/CHANGES.md#python-markdown2-236

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