What is CVE-2020-18439?

CVE-2020-18439 is a critical-severity vulnerability in Phpok. CVSS score: 9.1/10. Published 2021-11-02.

How severe is CVE-2020-18439?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Phpok

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.

Published 2021-11-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Phpok — versions 5.1

References

github.com/qinggan/phpok/issues/4 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-18439?: CVE-2020-18439 is a critical-severity vulnerability in Phpok. CVSS score: 9.1/10. Published 2021-11-02.
How severe is CVE-2020-18439?: Critical severity. CVSS v3 base score is 9.1 out of 10.