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TI-2021-04350 Aliases CVE-2021-21247

Post-Auth Unsafe Deserialization on BasePage (AJAX)

Priority MEDIUM 44CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, the application's BasePage registers an AJAX event listener (`AbstractPostAjaxBehavior`) in all pages other than the login page. This listener decodes and deserializes the `data` query parameter. We can access this listener by submitting a POST request to any page. This issue may lead to `post-auth RCE` This endpoint is subject to authentication and, therefore, requires a valid user to carry on the attack. This issue was addressed in 4.0.3 by encrypting serialization payload with secrets only known to server.

Why it matters now

EPSS 0.01521 74th percentileScored 2026-11-07
Fix Fixed onedev (theonedev): 4.0.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
theonedevonedevbefore 4.0.34.0.3Patch availableCNA
  • onedev Vendortheonedev Affected before 4.0.3 Fixed in 4.0.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:*before 4.0.3Vulnerabletheonedev
  • cpe:2.3:a:onedev_project:onedev:*:*:*:*:*:*:*:* Versions before 4.0.3 Vulnerable ·theonedev

Remediation

  • Fix · CNA onedev (theonedev) Fixed in 4.0.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21247

References

Advisory 1

  • TI-2021-04345 Pre-Auth Unsafe Deserialization on AttachmentUploadServet CVSS 3.1CRITICAL 10.0
  • TI-2022-18585 CI/CD Docker Escape in OneDev CVSS 3.1CRITICAL 9.9
  • TI-2022-18584 Access Control Bypass in Onedev CVSS 3.1CRITICAL 9.8
  • TI-2021-04346 Pre-Auth Unsafe Deserialization on KubernetesResource CVSS 3.1CRITICAL 10.0
  • TI-2022-18587 Git Repository Disclosure in Onedev CVSS 3.1HIGH 7.5
  • TI-2021-04349 Pre-Auth Access token leak CVSS 3.1HIGH 8.6
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences