What is CVE-2018-20012?

CVE-2018-20012 is a medium-severity vulnerability in Phpcmf, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-10.

How severe is CVE-2018-20012?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Phpcmf

CVE-2018-20012

PHPCMF 4.1.3 has XSS via the first input field to the index.php?s=member&c=register&m=index URI.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Phpcmf — versions 4.1.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitee.com/copy_cat/phpcmf/blob/master/README.md (Exploit, Vendor Advisory)
www.phpcmf.net/version-13.html (Vendor Advisory)

Frequently asked questions

What is CVE-2018-20012?: CVE-2018-20012 is a medium-severity vulnerability in Phpcmf, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2018-12-10.
How severe is CVE-2018-20012?: Medium severity. CVSS v3 base score is 4.8 out of 10.