{"id":"CVE-2026-52838","aliases":["GHSA-996f-334j-67g7"],"url":"https://o3.security/vulnerability/CVE-2026-52838","summary":"Easy!Appointments disable_booking_message rendered as raw HTML on public booking page — Stored XSS","details":"Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 allow administrators to define a custom \"booking disabled\" message through the booking settings page. That value is stored in the `disable_booking_message` setting via a rich-text editor and later passed directly to the public `booking_message` view without escaping or sanitization. An authenticated administrator can store HTML or JavaScript in this field, enable disabled-booking mode, and trigger stored XSS in every unauthenticated visitor who opens the public booking page. Version 1.6.0 fixes the issue.","published":"2026-07-14T15:07:43.865Z","modified":"2026-08-12T03:51:12.744427847Z","cvss":{"score":2.6,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:L/A:N"},"epss":{"score":0.00243,"percentile":0.15518,"asOf":"2026-09-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"alextselegidis/easyappointments","fixedVersion":null}],"fix":{"url":"https://github.com/alextselegidis/easyappointments/commit/629a0415f54f75556c17f4f5d9c77fda1fdbdeae","label":"alextselegidis/easyappointments@629a041"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52838.json"},{"type":"ADVISORY","url":"https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-996f-334j-67g7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52838"},{"type":"FIX","url":"https://github.com/alextselegidis/easyappointments/commit/629a0415f54f75556c17f4f5d9c77fda1fdbdeae"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.744427847Z"}}