What is CVE-2021-38721?

CVE-2021-38721 is a medium-severity vulnerability in Thedaylightstudio Fuel Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-09-09.

How severe is CVE-2021-38721?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-38721 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CSRF in Thedaylightstudio Fuel Cms

CVE-2021-38721

FUEL CMS 1.5.0 login.php contains a cross-site request forgery (CSRF) vulnerability

Vulnerability class: CSRF (Cross-Site Request Forgery)

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% 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

Thedaylightstudio Fuel Cms — versions 1.5.0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

github.com/daylightstudio/FUEL-CMS/issues/584 (Exploit, Third Party Advisory, Issue Tracking)
github.com/daylightstudio/FUEL-CMS/commit/6164cd794674d4d74da39f8b535ff588ab006… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38721?: CVE-2021-38721 is a medium-severity vulnerability in Thedaylightstudio Fuel Cms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-09-09.
How severe is CVE-2021-38721?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-38721 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.