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Vulnerability record · CVE-2021-44981 · published 24 January 2022

CVE-2021-44981: Quickbox os command injection vulnerability

Quickbox · Quickbox

In QuickBox Pro v2.5.8 and below, the config.php file has a variable which takes a GET parameter value and parses it into a shell_exec(''); function without properly sanitizing any shell arguments, therefore remote code execution is possible. Additionally, as the media server is running as root by default attackers can use the sudo command within this shell_exec(''); function, which allows for privilege escalation by means of RCE.

8.8 CVSS 3.1 High EPSS 3.7% · top 10.8% CWE-78 · OS command injection
8.8CVSS 3.1 base score, v2 9.0
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In QuickBox Pro v2.5.8 and below, the config.php file has a variable which takes a GET parameter value and parses it into a shell_exec(''); function without properly sanitizing any shell arguments, therefore remote code execution is possible. Additionally, as the media server is running as root by default attackers can use the sudo command within this shell_exec(''); function, which allows for privilege escalation by means of RCE.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/QuickBox/QB/issues/202 Issue TrackingThird Party Advisory
https://websec.nl/blog/61b2b37a43a1155c848f3b08/websec%20finds%20critical%20vulnerabilities%20in%20popular%20media%20ser ExploitThird Party Advisory
https://github.com/QuickBox/QB/issues/202 Issue TrackingThird Party Advisory
https://websec.nl/blog/61b2b37a43a1155c848f3b08/websec%20finds%20critical%20vulnerabilities%20in%20popular%20media%20ser ExploitThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-44981), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.