What is CVE-2020-20289?

CVE-2020-20289 is a critical-severity vulnerability in Yccms, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-02-01.

How severe is CVE-2020-20289?

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

SQL Injection in Yccms

CVE-2020-20289

Sql injection vulnerability in the yccms 3.3 project. The no_top function's improper judgment of the request parameters, triggers a sql injection vulnerability.

Vulnerability class: SQL Injection

Published 2021-02-01 · 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: 0.011 (65.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Yccms — versions 3.3

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.yccms.net/ (URL Repurposed, Product, Vendor Advisory)
blog.jiguang.xyz/posts/yccms-sql-injection/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-20289?: CVE-2020-20289 is a critical-severity vulnerability in Yccms, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-02-01.
How severe is CVE-2020-20289?: Critical severity. CVSS v3 base score is 9.8 out of 10.