What is CVE-2021-3317?

CVE-2021-3317 is a high-severity vulnerability in Klogserver Klog_server, classified under OS Command Injection. CVSS score: 8.8/10. Published 2021-01-26.

How severe is CVE-2021-3317?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-3317 known to be exploited?

14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Klogserver Klog_server

CVE-2021-3317

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

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.414 (98.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Klogserver Klog_server
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3317?: CVE-2021-3317 is a high-severity vulnerability in Klogserver Klog_server, classified under OS Command Injection. CVSS score: 8.8/10. Published 2021-01-26.
How severe is CVE-2021-3317?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-3317 known to be exploited?: 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.