CVE-2021-23420
Deserialization of Untrusted Data
CRITICAL
9.8
CVSS Score
Published: August 11, 2021 at 12:15 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorCodeception
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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Codeception· Codeceptioncomposer
95%Affected range stops below 3.1.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.22, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (4)
x_refsource_MISCBroken Link
Source: [email protected]
https://github.com/Codeception/Codeception/blob/4.1/ext/RunProcess.php%23L52x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/Codeception/Codeception/pull/6241x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/JinYiTong/pocx_refsource_MISCThird Party Advisory
Source: [email protected]
https://snyk.io/vuln/SNYK-PHP-CODECEPTIONCODECEPTION-1324585CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-502
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