{"answers":{"affected":"2 open source packages ship an affected version, including redaxo/source.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53599 exists.","fix":"Upgrade redaxo/source to 5.21.1 or later.","what":"CVE-2026-53599 is a high-severity vulnerability in redaxo core, published on 31 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53599 and fix it if it is affected.\n\nWhat it is: CVE-2026-53599 is a high-severity vulnerability in redaxo core, published on 31 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53599 exists.\n\nAffected packages and fixed versions:\n- redaxo/source (Packagist): affected from 5.18.2; fixed in 5.21.1\n- redaxo/source (Packagist): affected from 5.18.2; fixed in 5.21.1\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-2026-53599/ (Markdown: https://insights.sbomify.com/CVE-2026-53599/index.md)","id":"CVE-2026-53599","markdown":"https://insights.sbomify.com/CVE-2026-53599/index.md","name":"CVE-2026-53599","record":{"aliases":["GHSA-98pp-vccm-qm25"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Redaxo CMS","requires_auth":"low_privilege","summary":"Authenticated users can upload malicious files with multi-segment names to achieve remote code execution on servers with specific PHP handler configurations.","user_interaction":"not_required","vuln_class":"file_upload"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"description":"REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers","id":"CVE-2026-53599","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"file_upload","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"async-tar PAX extension-header desync enables tar entry/content smuggling","id":"CVE-2026-53600"},"packages":[{"ecosystem":"Packagist","fixed":["5.21.1"],"introduced":["5.18.2"],"last_affected":[],"package":"redaxo/source","purl":null,"source":"GHSA-98pp-vccm-qm25"},{"ecosystem":"Packagist","fixed":["5.21.1"],"introduced":["5.18.2"],"last_affected":[],"package":"redaxo/source","purl":"pkg:composer/redaxo/source","source":"GHSA-98pp-vccm-qm25"}],"prev":{"headline":"Prompty: Arbitrary File Read via ${file:path} Reference Expansion","id":"CVE-2026-53598"},"products":["core"],"published":"2026-07-31","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-31","vendors":["redaxo"]},"summary":"Authenticated users can upload malicious files with multi-segment names to achieve remote code execution on servers with specific PHP handler configurations.","url":"https://insights.sbomify.com/CVE-2026-53599/"}