CVE-2021-40940
CVSS v3
9.8
CRITICAL
EPSS Score
1.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Monstra 3.0.4 does not filter the case of php, which leads to an unrestricted file upload vulnerability.
Technical details
- Published
- 2022-06-15
Frequently asked questions
What is CVE-2021-40940?
Monstra 3.0.4 does not filter the case of php, which leads to an unrestricted file upload vulnerability.
Is CVE-2021-40940 actively exploited?
Active exploitation of CVE-2021-40940 has not been confirmed. Its EPSS score was 1.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-40940?
CVE-2021-40940 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-40940 affecting your environment?
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