CVE-2021-31769

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-21 · updated 2026-06-17
Weakness: CWE-78

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.

Affected products

Myq-Solution Myq Server: before 8.2 — fixed in 8.2

How to fix

Upgrade to a fixed version: Myq-Solution Myq Server 8.2. Check the vendor advisory for mitigations.

References

https://gist.github.com/bc0d3/6d55866a78f66569383241406e18794f
https://gist.github.com/bc0d3/6d55866a78f66569383241406e18794f

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