{"id":"CVE-2026-110101","published":"2026-10-13T17:17:33.830","lastModified":"2026-10-16T23:16:58.910","description":"Koillection through 1.8.4 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML files as Datum file attachments lacking MIME restrictions. Attackers can upload HTML payloads via POST /api/data/{id}/file, served as text/html from public/uploads, executing JavaScript in victims' sessions to perform actions on their behalf.","cvssScore":5.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-L50","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/releases/tag/1.8.4","tags":[]},{"url":"https://www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-attachment-uploads","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","tags":[]}],"exploitRefs":[{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-L50","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/releases/tag/1.8.4","tags":[]},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","tags":[]}],"hasPoc":true,"ai":null}