CVE-2021-31769

Name: CVE-2021-31769
Creator: NVD / NIST
Published: 2021-06-21T11:15:07.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.06%

Last modified Jun 17, 2026

CVE-2021-31769 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. MyQ Server in MyQ X Smart before 8.2 allows remote code execution by unprivileged users because administrative session data can be read in the %PROGRAMFILES%\MyQ\PHP\Sessions directory. The "Select server file" feature is only intended for administrators but actually does not require authorization. EPSS estimates a 4.06% chance of exploitation in the next 30 days.

Description

MyQ Server in MyQ X Smart before 8.2 allows remote code execution by unprivileged users because administrative session data can be read in the %PROGRAMFILES%\MyQ\PHP\Sessions directory. The "Select server file" feature is only intended for administrators but actually does not require authorization. An attacker can inject arbitrary OS commands (such as commands to create new .php files) via the Task Scheduler component.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

4.06%

89.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Myq-Solution	Myq Server	< 8.2

References

https://gist.github.com/bc0d3/6d55866a78f66569383241406e18794fExploit, Third Party Advisory
https://gist.github.com/bc0d3/6d55866a78f66569383241406e18794fExploit, Third Party Advisory

Timeline

Published: Jun 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31769?

How severe is CVE-2021-31769?

CVE-2021-31769 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.06% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31769?

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-2021-31769?

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

Scan your code now

Source: NVD / NIST