{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21247 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21247 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21247 is a critical unsafe deserialization vulnerability in theonedev onedev, published on 15 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21247 and fix it if it is affected.\n\nWhat it is: CVE-2021-21247 is a critical unsafe deserialization vulnerability in theonedev onedev, published on 15 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-21247 in the wild and no public exploit code.\n\nAffected product: theonedev onedev. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-21247/ (Markdown: https://insights.sbomify.com/CVE-2021-21247/index.md)","id":"CVE-2021-21247","markdown":"https://insights.sbomify.com/CVE-2021-21247/index.md","name":"CVE-2021-21247","record":{"aliases":["GHSA-6pxf-75cf-vwjp"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"OneDev DevOps platform","requires_auth":"low_privilege","summary":"Authenticated attackers can achieve remote code execution via unsafe deserialization of AJAX parameters in OneDev.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"onedev","vendor":"onedev_project"}],"cvss":{"score":9.6,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"},{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Post-Auth Unsafe Deserialization on BasePage (AJAX)","id":"CVE-2021-21247","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Post-Auth Arbitrary Code execution via Groovy script injection","id":"CVE-2021-21248"},"packages":[],"prev":{"headline":"Pre-Auth Access token leak","id":"CVE-2021-21246"},"products":["onedev"],"published":"2021-01-15","related":[{"cvss_score":10,"headline":"Pre-Auth Unsafe Deserialization on AttachmentUploadServet","id":"CVE-2021-21242","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":10,"headline":"Pre-Auth Unsafe Deserialization on KubernetesResource","id":"CVE-2021-21243","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":10,"headline":"Pre-Auth SSTI via Bean validation message tampering","id":"CVE-2021-21244","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":10,"headline":"Pre-Auth Arbitrary File Upload","id":"CVE-2021-21245","kev_date_added":null,"published":"2021-01-15"},{"cvss_score":9.9,"headline":"CI/CD Docker Escape in OneDev","id":"CVE-2022-39206","kev_date_added":null,"published":"2022-09-13"},{"cvss_score":9.6,"headline":"Post-Auth Arbitrary Code execution via Groovy script injection","id":"CVE-2021-21248","kev_date_added":null,"published":"2021-01-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["theonedev"]},"summary":"Authenticated attackers can achieve remote code execution via unsafe deserialization of AJAX parameters in OneDev.","url":"https://insights.sbomify.com/CVE-2021-21247/"}