CVE-2021-23420
CVSS v3
9.8
CRITICAL
EPSS Score
2.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
This affects the package codeception/codeception from 4.0.0 and before 4.1.22, before 3.1.3. The RunProcess class can be leveraged as a gadget to run arbitrary commands on a system that is deserializing user input without validation.
Technical details
- Published
- 2021-08-11
Frequently asked questions
What is CVE-2021-23420?
This affects the package codeception/codeception from 4.0.0 and before 4.1.22, before 3.1.3. The RunProcess class can be leveraged as a gadget to run arbitrary commands on a system that is deserializing user input without validation.
Is CVE-2021-23420 actively exploited?
Active exploitation of CVE-2021-23420 has not been confirmed. Its EPSS score was 2.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-23420?
CVE-2021-23420 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-23420 affecting your environment?
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