RUSTSEC-2021-0063: XSS in `comrak`

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XSS in comrak

Details
Package	comrak
Version	0.7.0
URL	https://github.com/kivikakk/comrak/releases/tag/0.10.1
Date	2021-05-04
Patched versions	>=0.10.1

comrak operates by default in a "safe" mode of operation where unsafe content, such as arbitrary raw HTML or URLs with non-standard schemes, are not permitted in the output. This is per the reference GFM implementation, cmark-gfm.

Ampersands were not being correctly escaped in link targets, making it possible to fashion unsafe URLs using schemes like data: or javascript: by entering them as HTML entities, e.g. &#x64&#x61&#x74&#x61&#x3a. The intended behaviour, demonstrated upstream, is that these should be escaped and therefore harmless, but this behaviour was broken in comrak.

See advisory page for additional details.