What is CVE-2019-15521?

CVE-2019-15521 is a critical-severity vulnerability in Fork-Cms Fork Cms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-08-26.

How severe is CVE-2019-15521?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Fork-Cms Fork Cms

CVE-2019-15521

Spoon Library through 2014-02-06, as used in Fork CMS before 1.4.1 and other products, allows PHP object injection via a cookie containing an object.

Vulnerability class: Insecure Deserialization

Published 2019-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/forkcms/library/pull/69 (Patch, Third Party Advisory)
github.com/forkcms/library/releases/tag/1.4.1 (Third Party Advisory, Release Notes)
github.com/spoon/library/blob/bda89be80b7e1ffdc93d3180d33a56927430298b/spoon/co… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-15521?: CVE-2019-15521 is a critical-severity vulnerability in Fork-Cms Fork Cms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-08-26.
How severe is CVE-2019-15521?: Critical severity. CVSS v3 base score is 9.8 out of 10.