CVE-2021-23836

Public Exploit

Description

An issue was discovered in flatCore before 2.0.0 build 139. A stored XSS vulnerability was identified in the prefs_smtp_psw HTTP request body parameter for the acp interface. An admin user can inject malicious client-side script into the affected parameter without any form of input sanitization. The injected payload will be executed in the browser of a user whenever one visits the affected module page.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.40%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory github.com Third-Party Advisory sec-consult.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/flatCore/flatCore-CMS third party advisory product
https://sec-consult.com/vulnerability-lab/ third party advisory
http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.html exploit vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-23836?
CVE-2021-23836 has been scored as a medium severity vulnerability.
How to fix CVE-2021-23836?
To fix CVE-2021-23836, 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-2021-23836 being actively exploited in the wild?
It is possible that CVE-2021-23836 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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