What is CVE-2018-16278?

CVE-2018-16278 is a critical-severity vulnerability in Phpkaiyuancms Phpopensourcecms, classified under SQL Injection. CVSS score: 9.8/10. Published 2018-08-31.

How severe is CVE-2018-16278?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SQL Injection in Phpkaiyuancms Phpopensourcecms

CVE-2018-16278

phpkaiyuancms PhpOpenSourceCMS (POSCMS) V3.2.0 allows an unauthenticated user to execute arbitrary SQL commands via the diy/module/member/controllers/Api.php ajax_save_draft function with the dir parameter.

Vulnerability class: SQL Injection

Published 2018-08-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.7th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Phpkaiyuancms Phpopensourcecms — versions 3.2.0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

github.com/howchen/howchen/issues/3 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-16278?: CVE-2018-16278 is a critical-severity vulnerability in Phpkaiyuancms Phpopensourcecms, classified under SQL Injection. CVSS score: 9.8/10. Published 2018-08-31.
How severe is CVE-2018-16278?: Critical severity. CVSS v3 base score is 9.8 out of 10.