What is CVE-2022-37721?

CVE-2022-37721 is a critical-severity vulnerability in Pyrocms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2022-11-25.

How severe is CVE-2022-37721?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XSS in Pyrocms

CVE-2022-37721

PyroCMS 3.9 is vulnerable to a stored Cross Site Scripting (XSS_ when a low privileged user such as an author, injects a crafted html and javascript payload in a blog post, leading to full admin account takeover or privilege escalation.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-11-25 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.000

Affected products

Pyrocms — versions 3.9

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
labs.integrity.pt/advisories/cve-2022-37721/ (Third Party Advisory)

Frequently asked questions

What is CVE-2022-37721?: CVE-2022-37721 is a critical-severity vulnerability in Pyrocms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2022-11-25.
How severe is CVE-2022-37721?: Critical severity. CVSS v3 base score is 9.0 out of 10.