What is CVE-2020-19626?

CVE-2020-19626 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-26.

How severe is CVE-2020-19626?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Craftcms Craft Cms

CVE-2020-19626

Cross Site Scripting (XSS) vulnerability in craftcms 3.1.31, allows remote attackers to inject arbitrary web script or HTML, via /admin/settings/sites/new.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.6th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% 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

Craftcms Craft Cms — versions 3.1.31

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mayoterry.com/file/cve/XSS_vuluerability_in_Craftcms_3.1.31.pdf (Exploit, Third Party Advisory)
github.com/craftcms/cms/commit/76a2168b6a5e30144f5c06da4ff264f4eca577ff (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-19626?: CVE-2020-19626 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-26.
How severe is CVE-2020-19626?: Medium severity. CVSS v3 base score is 5.4 out of 10.