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PYSEC-2018-13

Quick fix

PYSEC-2018-13 — markdown2: upgrade to the fixed version with the command below.

pip install --upgrade 'markdown2>=2.3.6'

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 '>' character from an IMG tag.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/markdown2

Introduced in: 0Fixed in: 2.3.6

Fixpip install --upgrade 'markdown2>=2.3.6'

References

https://github.com/trentm/python-markdown2/issues/285[REPORT]
https://github.com/advisories/GHSA-p6h9-gw49-rqm4[ADVISORY]