What is CVE-2019-13961?

CVE-2019-13961 is a high-severity vulnerability in Flatcore, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-07-18.

How severe is CVE-2019-13961?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Flatcore

CVE-2019-13961

A CSRF vulnerability was found in flatCore before 1.5, leading to the upload of arbitrary .php files via acp/core/files.upload-script.php.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2019-07-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Flatcore

Weakness classification (CWE)

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

References

github.com/flatCore/flatCore-CMS/issues/39 (Exploit, Third Party Advisory)
github.com/flatCore/flatCore-CMS/compare/35fee64...de90af3 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-13961?: CVE-2019-13961 is a high-severity vulnerability in Flatcore, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-07-18.
How severe is CVE-2019-13961?: High severity. CVSS v3 base score is 8.8 out of 10.