What is CVE-2020-19950?

CVE-2020-19950 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-09-23.

How severe is CVE-2020-19950?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Yzmcms

CVE-2020-19950

A cross-site scripting (XSS) vulnerability in the /banner/add.html component of YzmCMS v5.3 allows attackers to execute arbitrary web scripts or HTML.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-09-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Yzmcms — versions 5.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/yzmcms/yzmcms/issues/22 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-19950?: CVE-2020-19950 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-09-23.
How severe is CVE-2020-19950?: Medium severity. CVSS v3 base score is 4.8 out of 10.