CVE-2018-1000874

Public Exploit

Description

PHP cebe markdown parser version 1.2.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in all distributed parsers allowing a malicious crafted script to be executed that can result in the lose of user data and sensitive user information. This attack can be exploited by crafting a three backtick wrapped payload with a character in front: L: "```<script>alert();</script>```". NOTE: This has been argued as a non-issue (see references) since it is not the parser's job to sanitize malicious code from a parsed document

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.22%
Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/cebe/markdown/issues/166 issue tracking exploit third party advisory
https://github.com/cebe/markdown/issues/166#issuecomment-508230493

Frequently Asked Questions

What is the severity of CVE-2018-1000874?
CVE-2018-1000874 has been scored as a medium severity vulnerability.
How to fix CVE-2018-1000874?
To fix CVE-2018-1000874, 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-2018-1000874 being actively exploited in the wild?
It is possible that CVE-2018-1000874 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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