What is CVE-2020-18457?

CVE-2020-18457 is a medium-severity vulnerability in Bycms Project, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2021-08-12.

How severe is CVE-2020-18457?

Medium severity. CVSS v3 base score is 6.8 out of 10.

CSRF in Bycms Project

CVE-2020-18457

Cross Site Request Forgery (CSRF) vulnerability exists in bycms v1.3.0 that can add an admin account via admin.php/ucenter/add.html.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-08-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% 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

Bycms Project — versions 1.3.0

Weakness classification (CWE)

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

References

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

Frequently asked questions

What is CVE-2020-18457?: CVE-2020-18457 is a medium-severity vulnerability in Bycms Project, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.8/10. Published 2021-08-12.
How severe is CVE-2020-18457?: Medium severity. CVSS v3 base score is 6.8 out of 10.