Onedev
CVE-2021-21251
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could access files and directories outside the intended path by sending crafted requests to the affected application. |
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Alert meAnalysisAI
OneDev is an all-in-one devops platform. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. OneDev is an all-in-one devops platform. In OneDev before version 4.0.3 there is a critical "zip slip" vulnerability. This issue may lead to arbitrary file write. The KubernetesResource REST endpoint untars user controlled data from the request body using TarUtils. TarUtils is a custom library method leveraging Apache Commons Compress. During the untar process, there are no checks in place to prevent an untarred file from traversing the file system and overriding an existing file. For a successful exploitation, the attacker requires a valid __JobToken__ which may not be possible to get without using any of the other reported vulnerabilities. But this should be considered a vulnerability in io.onedev.commons.utils.TarUtils since it lives in a different artifact and can affect other projects using it. This issue was addressed in 4.0.3 by validating paths in tar archive to only allow them to be in specified folder when extracted. Affected products include: Onedev Project Onedev. Version information: version 4.0.3.
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
OneDev is an all-in-one devops platform. In OneDev before version 4.0.3 there is a critical "zip slip" vulnerability. This issue may lead to arbitrary file write. The KubernetesResource REST endpoint untars user controlled data from the request body using TarUtils. TarUtils is a custom library method leveraging Apache Commons Compress. During the untar process, there are no checks in place to prevent an untarred file from traversing the file system and overriding an existing file. For a successful exploitation, the attacker requires a valid __JobToken__ which may not be possible to get without using any of the other reported vulnerabilities. But this should be considered a vulnerability in io.onedev.commons.utils.TarUtils since it lives in a different artifact and can affect other projects using it. This issue was addressed in 4.0.3 by validating paths in tar archive to only allow them to be in specified folder when extracted.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
Affected Products (CPE)NVD
Onedev is an open source, self-hosted Git Server with CI/CD and Kanban. Rated critical severity (CVSS 9.9), this vulnera
Onedev is an open source, self-hosted Git Server with CI/CD and Kanban. Rated critical severity (CVSS 9.8), this vulnera
Onedev v7.4.14 contains a path traversal vulnerability which allows attackers to access restricted files and directories
OneDev is a Git server with CI/CD, kanban, and packages. Rated high severity (CVSS 8.7), this vulnerability is remotely
Onedev is an open source, self-hosted Git Server with CI/CD and Kanban. Rated high severity (CVSS 7.5), this vulnerabili
OneDev is an all-in-one devops platform. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no
OneDev is an all-in-one devops platform. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
OneDev is an all-in-one devops platform. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
OneDev is an all-in-one devops platform. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
OneDev is an all-in-one devops platform. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
Onedev is an open source, self-hosted Git Server with CI/CD and Kanban. Rated medium severity (CVSS 5.4), this vulnerabi
Onedev is a self-hosted Git Server with CI/CD and Kanban. Rated high severity (CVSS 8.8), this vulnerability is remotely
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