CVE-2026-110101
mediumKoillection through 1.8.4 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML files as Datum file attachments l…
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145 disclosure@vulncheck.com
- https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-... disclosure@vulncheck.com
- https://github.com/benjaminjonard/koillection/issues/1609 disclosure@vulncheck.com
- https://github.com/benjaminjonard/koillection/releases/tag/1.8.4 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-a... disclosure@vulncheck.com
- https://github.com/benjaminjonard/koillection/issues/1609 134c704f-9b21-4f2e-91b3-4a467353bcc0