{"answers":{"affected":"4 open source packages ship an affected version, including openmage/magento-lts. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21426 in the wild and no public exploit code.","fix":"Upgrade openmage/magento-lts to a fixed version for your release line: 19.4.13 or 20.0.9.","what":"CVE-2021-21426 is a critical unsafe deserialization vulnerability in OpenMage magento-lts, published on 21 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-21426 and fix it if it is affected.\n\nWhat it is: CVE-2021-21426 is a critical unsafe deserialization vulnerability in OpenMage magento-lts, published on 21 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-21426 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- openmage/magento-lts (Packagist): affected all versions; fixed in 19.4.13\n- openmage/magento-lts (Packagist): affected all versions; fixed in 19.4.13\n- openmage/magento-lts (Packagist): affected from 20.0.0; fixed in 20.0.9\n- openmage/magento-lts (Packagist): affected from 20.0.0; fixed in 20.0.9\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-2021-21426/ (Markdown: https://insights.sbomify.com/CVE-2021-21426/index.md)","id":"CVE-2021-21426","markdown":"https://insights.sbomify.com/CVE-2021-21426/index.md","name":"CVE-2021-21426","record":{"aliases":["GHSA-m496-x567-f98c"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Magento LTS","requires_auth":"none","summary":"Unsecured deserialization in Magento LTS allows attackers to execute arbitrary code via the Stream HTTP Wrapper.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"magento","vendor":"openmage"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Magento-lts is a long-term support alternative to Magento Community Edition (CE). In magento-lts versions 19.4.12 and prior and 20.0.8 and prior, there is a vulnerability caused by the unsecured deserialization of an object. A patch in versions 19.4.13 and 20.0.9 was back ported from Zend Framework 3. The vulnerability was assigned CVE-2021-3007 in Zend Framework.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Fixes a bug in Zend Framework's Stream HTTP Wrapper","id":"CVE-2021-21426","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":4,"n_references":1,"next":{"headline":"Backport for CVE-2021-21024 Blind SQLi from Magento 2","id":"CVE-2021-21427"},"packages":[{"ecosystem":"Packagist","fixed":["19.4.13"],"introduced":["0"],"last_affected":[],"package":"openmage/magento-lts","purl":null,"source":"GHSA-m496-x567-f98c"},{"ecosystem":"Packagist","fixed":["19.4.13"],"introduced":["0"],"last_affected":[],"package":"openmage/magento-lts","purl":"pkg:composer/openmage/magento-lts","source":"GHSA-m496-x567-f98c"},{"ecosystem":"Packagist","fixed":["20.0.9"],"introduced":["20.0.0"],"last_affected":[],"package":"openmage/magento-lts","purl":null,"source":"GHSA-m496-x567-f98c"},{"ecosystem":"Packagist","fixed":["20.0.9"],"introduced":["20.0.0"],"last_affected":[],"package":"openmage/magento-lts","purl":"pkg:composer/openmage/magento-lts","source":"GHSA-m496-x567-f98c"}],"prev":{"headline":"Unauthenticated Arbitrary YAML Write/Update leads to Code Execution","id":"CVE-2021-21425"},"products":["magento-lts"],"published":"2021-04-21","related":[{"cvss_score":9.1,"headline":"Backport for CVE-2021-21024 Blind SQLi from Magento 2","id":"CVE-2021-21427","kev_date_added":null,"published":"2021-04-21"},{"cvss_score":8.8,"headline":"OpenMage LTS authenticated remote code execution through layout update","id":"CVE-2021-41144","kev_date_added":null,"published":"2023-01-27"},{"cvss_score":8.7,"headline":"OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution","id":"CVE-2026-40488","kev_date_added":null,"published":"2026-04-20"},{"cvss_score":8.1,"headline":"OpenMage LTS's Phar Deserialization leads to Remote Code Execution","id":"CVE-2026-25524","kev_date_added":null,"published":"2026-04-20"},{"cvss_score":8,"headline":"RCE in Magento","id":"CVE-2020-15244","kev_date_added":null,"published":"2020-10-21"},{"cvss_score":7.5,"headline":"Magento LTS's guest order \"protect code\" can be brute-forced too easily","id":"CVE-2023-41879","kev_date_added":null,"published":"2023-09-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":["OpenMage"]},"summary":"Unsecured deserialization in Magento LTS allows attackers to execute arbitrary code via the Stream HTTP Wrapper.","url":"https://insights.sbomify.com/CVE-2021-21426/"}