HOMEVULNERABILITIESCVE-2021-21245
CRITICAL

CVE-2021-21245

CWE-434Published: January 15, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, AttachmentUploadServlet also saves user controlled data (`request.getInputStream()`) to a user specified location (`request.getHeader("File-Name")`). This issue may lead to arbitrary file upload which can be used to upload a WebShell to OneDev server. This issue is addressed in 4.0.3 by only allowing uploaded file to be in attachments folder. The webshell issue is not possible as OneDev never executes files in attachments folder.

NVD Source

Technical Analysis

CVE-2021-21245 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

onedev_project1 product(s)
onedev
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacb
PATCHhttps://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacb
ADVISORYhttps://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9
ADVISORYhttps://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9

All References (4)

→
https://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacbPatch · Third Party Advisory
→
https://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9Third Party Advisory
→
https://github.com/theonedev/onedev/commit/0c060153fb97c0288a1917efdb17cc426934dacbPatch · Third Party Advisory
→
https://github.com/theonedev/onedev/security/advisories/GHSA-62m2-38q5-96w9Third Party Advisory

Quick Facts

CVE IDCVE-2021-21245
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedJan 15, 2021

Related CVEs (CWE-434)

CVE-2024-0916
10.0
CVE-2024-32700
10.0
CVE-2023-23656
10.0
CVE-2023-49815
10.0
CVE-2024-31115
10.0
CVE-2024-34555
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-21245 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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