{"id":"CVE-2026-117538","title":"REDAXO before 5.21.0 Reflected XSS via Packages API function Parameter","summary":"REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability in the backend packages API, where the function parameter is concatenated into an error message rendered without HTML escaping. Attackers can lure an authentica…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-79"],"vendor":"redaxo","product":"core","affected":["core < 5.21.0"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T10:59:32.772Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-117538","references":[{"url":"https://github.com/redaxo/core/security/advisories/GHSA-xq4j-g85q-wf97","label":"GitHub Security Advisory (GHSA-xq4j-g85q-wf97)"},{"url":"https://www.vulncheck.com/advisories/redaxo-before-5.21.0-reflected-xss-via-packages-api-function-parameter","label":"VulnCheck Advisory: REDAXO before 5.21.0 Reflected XSS via Packages API function Parameter"}],"tags":["cve.org"],"ingestedAt":"2026-10-27T16:11:59.302Z","slug":"CVE-2026-117538","body":"## Overview\n\nREDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability in the backend packages API, where the function parameter is concatenated into an error message rendered without HTML escaping. Attackers can lure an authenticated backend user to a crafted link containing a valid CSRF token, executing JavaScript that performs same-origin actions or reads DOM data.\n\n## Affected\n\n- `core < 5.21.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}