{"id":"CVE-2026-87928","title":"MaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the admin_page upload handler that allows any logged-in user to upload HTML files","summary":"MaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the admin_page upload handler that allows any logged-in user to upload HTML files. Attackers can upload HTML containing malicious scripts to the uplo…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-434"],"vendor":"MaxSite","product":"MaxSite CMS","affected":["cms >= 0.94 <= 109.6"],"published":"2026-09-09","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:35.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87928","references":[{"url":"https://github.com/EviL0rd/maxsite-cve2/blob/main/2026.09.08-maxsite-cms-arbitrary-file-write-stored-xss.md","label":"disclosure@vulncheck.com"},{"url":"https://github.com/maxsite/cms","label":"disclosure@vulncheck.com"},{"url":"https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/maxsite/admin/plugins/admin_page/uploads-require-maxsite.php#L1-L64","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/maxsite-cms-0.94-through-109.6-html-upload-xss-via-admin-page","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00171,"epssPercentile":0.06837,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T17:10:14.855155Z"},"ingestedAt":"2026-09-10T20:32:13.442Z","slug":"CVE-2026-87928","body":"## Overview\n\nMaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the admin_page upload handler that allows any logged-in user to upload HTML files. Attackers can upload HTML containing malicious scripts to the uploads/_pages/ directory, which executes in visitors' browsers when the file is accessed, enabling persistent stored cross-site scripting attacks.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}