CVE-2021-23837

Name: CVE-2021-23837
Creator: NVD / NIST
Published: 2021-01-15T07:15:14.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2021-23837 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue was discovered in flatCore before 2.0.0 build 139. A time-based blind SQL injection was identified in the selected_folder HTTP request body parameter for the acp interface. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

An issue was discovered in flatCore before 2.0.0 build 139. A time-based blind SQL injection was identified in the selected_folder HTTP request body parameter for the acp interface. The affected parameter (which retrieves the file contents of the specified folder) was found to be accepting malicious user input without proper sanitization, thus leading to SQL injection. Database related information can be successfully retrieved.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.46%

70.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Flatcore	Flatcore	<= 2.0.0

References

http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/flatCore/flatCore-CMSProduct, Third Party Advisory
https://sec-consult.com/vulnerability-lab/Third Party Advisory
http://packetstormsecurity.com/files/160936/flatCore-CMS-XSS-File-Disclosure-SQL-Injection.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/flatCore/flatCore-CMSProduct, Third Party Advisory
https://sec-consult.com/vulnerability-lab/Third Party Advisory

Timeline

Published: Jan 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23837?

How severe is CVE-2021-23837?

CVE-2021-23837 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23837?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23837?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST