What is CVE-2018-18742?

CVE-2018-18742 is a high-severity vulnerability in Sem-Cms Semcms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2018-10-29.

How severe is CVE-2018-18742?

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

CSRF in Sem-Cms Semcms

CVE-2018-18742

A CSRF issue was discovered in SEMCMS 3.4 via the admin/SEMCMS_User.php?Class=add&CF=user URI.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2018-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.1% 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

Sem-Cms Semcms — versions 3.4

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/AvaterXXX/SEMCMS/blob/master/CSRF.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18742?: CVE-2018-18742 is a high-severity vulnerability in Sem-Cms Semcms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2018-10-29.
How severe is CVE-2018-18742?: High severity. CVSS v3 base score is 8.8 out of 10.