decap-server contains a path traversal vulnerability in the local proxy containment guard that uses plain string prefix comparison without path separator validation. Attackers can access sibling directories whose names begin with the repository directory name to read, write, or delete files outside the intended repository root.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/decaporg/decap-cms
disclosure@vulncheck.com
https://github.com/decaporg/decap-cms/blob/11f35405cd1a1d1216e97b890173f4643675…
disclosure@vulncheck.com
https://github.com/geo-chen/oss/blob/main/decap-cms.md
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/decap-server-path-traversal-via-sibling-di…
disclosure@vulncheck.com