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CVE-2021-3317

HighPublished

KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.

Published: Jan 26, 2021
Updated: Aug 3, 2024
Assigning CNA: mitre
Evidence observed: Feb 1, 2021

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

41.4%

Moderate · next 30 days

Percentile: 98.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

KLog Server through 2.4.1 allows authenticated command injection. async.php calls shell_exec() on the original value of the source parameter.

Sources

CVE-2021-3317Exploit
CVE-2021-3317
Klog Server 2.4.1 - Command Injection (Authenticated)Exploit
Metin Yunus Kandemir · php · Feb 1, 2021

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