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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.014 (70.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/ExpressionEngine/ExpressionEngine/releases/tag/6.0.3 (Third Party Advisory, Release Notes)
- github.com/ExpressionEngine/ExpressionEngine/compare/6.0.1...6.0.3 (Patch, Third Party Advisory)
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.