CVE-2019-10905

Public Exploit

Description

Parsedown before 1.7.2, when safe mode is used and HTML markup is disabled, might allow attackers to execute arbitrary JavaScript code if a script (already running on the affected page) executes the contents of any element with a specific class. This occurs because spaces are permitted in code block infostrings, which interferes with the intended behavior of a single class name beginning with the language- substring.

Category

8.1
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.52%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/erusev/parsedown/issues/699 third party advisory issue tracking exploit
https://github.com/erusev/parsedown/releases/tag/1.7.2 third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2019-10905?
CVE-2019-10905 has been scored as a high severity vulnerability.
How to fix CVE-2019-10905?
To fix CVE-2019-10905, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-10905 being actively exploited in the wild?
It is possible that CVE-2019-10905 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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