CVE-2021-33199

9.8 criticalEPSS 1.4%

Critical (9.8) in expressionengine expressionengine. EPSS 1.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2021-08-12
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

expressionengine:expressionengine

References

https://github.com/ExpressionEngine/ExpressionEngine/compare/6.0.1...6.0.3#diff-17bcb23e5666fc2dccb79c7133e9eeb701847f67ae84fbde0a673c3fd3d109e0R508
https://github.com/ExpressionEngine/ExpressionEngine/releases/tag/6.0.3
https://github.com/ExpressionEngine/ExpressionEngine/compare/6.0.1...6.0.3#diff-17bcb23e5666fc2dccb79c7133e9eeb701847f67ae84fbde0a673c3fd3d109e0R508
https://github.com/ExpressionEngine/ExpressionEngine/releases/tag/6.0.3

Check your stack JSON