What is CVE-2020-18078?

CVE-2020-18078 is a critical-severity vulnerability in Sem-Cms Semcms. CVSS score: 9.8/10. Published 2021-12-17.

How severe is CVE-2020-18078?

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

Vulnerability in Sem-Cms Semcms

CVE-2020-18078

A vulnerability in /include/web_check.php of SEMCMS v3.8 allows attackers to reset the Administrator account's password.

Published 2021-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.7% 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

Sem-Cms Semcms — versions 3.8

References

github.com/cve-vul/vul/blob/master/SEMCMS/back_password_reset.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-18078?: CVE-2020-18078 is a critical-severity vulnerability in Sem-Cms Semcms. CVSS score: 9.8/10. Published 2021-12-17.
How severe is CVE-2020-18078?: Critical severity. CVSS v3 base score is 9.8 out of 10.