What is CVE-2022-37421?

CVE-2022-37421 is a medium-severity vulnerability in Silverstripe, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-11-23.

How severe is CVE-2022-37421?

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

XSS in Silverstripe

CVE-2022-37421

Silverstripe silverstripe/cms through 4.11.0 allows XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-11-23 · 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: 0.006 (44.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000

Affected products

Silverstripe

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.silverstripe.org/download/security-releases/ (Vendor Advisory)
www.silverstripe.org/blog/tag/release (Patch, Vendor Advisory)
forum.silverstripe.org/c/releases (Release Notes, Vendor Advisory)
www.silverstripe.org/download/security-releases/CVE-2022-37421 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-37421?: CVE-2022-37421 is a medium-severity vulnerability in Silverstripe, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-11-23.
How severe is CVE-2022-37421?: Medium severity. CVSS v3 base score is 5.4 out of 10.