CVE-2021-47936
OpenCATS 0.9.4 Remote Code Execution via Resume Upload
9.8CVSSCRITICAL
Description
OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by uploading malicious PHP files disguised as resume attachments. Attackers can upload PHP payloads through the careers job application endpoint and execute system commands via POST requests to the uploaded file in the upload directory.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
Attack Graph
Products CVE Techniques Tactics
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Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
MITRE ATT&CK
2 techniques Initial Access
References
https://github.com/opencats/OpenCATS
github.com
https://www.exploit-db.com/exploits/50585
exploit-db.com
https://www.opencats.org/
opencats.org
and 1 more references View all →
Timeline
Published
May 10, 2026
Last Updated
May 12, 2026
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