What is CVE-2020-20586?

CVE-2020-20586 is a medium-severity vulnerability in Xyhcms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.5/10. Published 2021-07-08.

How severe is CVE-2020-20586?

Medium severity. CVSS v3 base score is 4.5 out of 10.

CSRF in Xyhcms

CVE-2020-20586

A cross site request forgery (CSRF) vulnerability in the /xyhai.php?s=/Auth/editUser URI of XYHCMS V3.6 allows attackers to edit any information of the administrator such as the name, e-mail, and password.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-07-08 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Xyhcms — versions 3.6

Weakness classification (CWE)

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

References

www.xyhcms.com/Show/download/id/2/at/0.html (Broken Link)
af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
github.com/0xyu/PHP_Learning/issues/4 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-20586?: CVE-2020-20586 is a medium-severity vulnerability in Xyhcms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.5/10. Published 2021-07-08.
How severe is CVE-2020-20586?: Medium severity. CVSS v3 base score is 4.5 out of 10.