What is CVE-2020-21649?

CVE-2020-21649 is a high-severity vulnerability in Myucms Project, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.1/10. Published 2021-10-06.

How severe is CVE-2020-21649?

High severity. CVSS v3 base score is 8.1 out of 10.

SSRF in Myucms Project

CVE-2020-21649

Myucms v2.2.1 contains a server-side request forgery (SSRF) in the component \controller\index.php, which can be exploited via the sql() method.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2021-10-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Myucms Project — versions 2.2

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/lolipop1234/XXD/issues/4 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-21649?: CVE-2020-21649 is a high-severity vulnerability in Myucms Project, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.1/10. Published 2021-10-06.
How severe is CVE-2020-21649?: High severity. CVSS v3 base score is 8.1 out of 10.