CVE-2020-18439

Name: CVE-2020-18439
Creator: NVD / NIST
Published: 2021-11-02T18:15:07.877+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2020-18439 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An issue was discoverered in in function edit_save_f in framework/admin/tpl_control.php in qinggan phpok 5.1, allows attackers to write arbitrary files or get a shell.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

An issue was discoverered in in function edit_save_f in framework/admin/tpl_control.php in qinggan phpok 5.1, allows attackers to write arbitrary files or get a shell.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.97%

57.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Phpok	Phpok	5.1

References

https://github.com/qinggan/phpok/issues/4Exploit, Issue Tracking, Third Party Advisory
https://github.com/qinggan/phpok/issues/4Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Nov 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-18439?

An issue was discoverered in in function edit_save_f in framework/admin/tpl_control.php in qinggan phpok 5.1, allows attackers to write arbitrary files or get a shell.

How severe is CVE-2020-18439?

CVE-2020-18439 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2020-18439?

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-2020-18439?

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

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Source: NVD / NIST