What is CVE-2021-33199?

CVE-2021-33199 is a critical-severity vulnerability in Expressionengine, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2021-08-12.

How severe is CVE-2021-33199?

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

Improper input validation in Expressionengine

CVE-2021-33199

In Expression Engine before 6.0.3, addonIcon in Addons/file/mod.file.php relies on the untrusted input value of input->get('file') instead of the fixed file names of icon.png and icon.svg.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.014 (68.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Expressionengine
N/a — versions n/a

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-33199?: CVE-2021-33199 is a critical-severity vulnerability in Expressionengine, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2021-08-12.
How severe is CVE-2021-33199?: Critical severity. CVSS v3 base score is 9.8 out of 10.