CVE-2021-21247
mediumpriority · track · 36EPSS 0.015 · 74 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.5–9.6
weaknesses
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affected products (2)
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also known as (2)
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sources
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references (4)
External citations — patches, advisories, analysis.
- https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjpcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-21247cnnvd
- https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjpenisa_euvd
- https://github.com/theonedev/onedev/security/advisories/GHSA-6pxf-75cf-vwjpThird Party Advisorynvd
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