CVE-2026-110101CWE-79cross-site-scripting

CVE-2026-110101

Medium · published October 13, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
11.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00215 · 11.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-13T21:17Z
References (6)
https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145 · [email protected]https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-L50 · [email protected]https://github.com/benjaminjonard/koillection/issues/1609 · [email protected]https://github.com/benjaminjonard/koillection/releases/tag/1.8.4 · [email protected]https://www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-attachment-uploads · [email protected]https://github.com/benjaminjonard/koillection/issues/1609 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 16:53Z
    Koillection through 1.8.4 Stored XSS via Datum File Attachment Uploads
    cvelistv5
  • 13 OCT 16:53Z
    Koillection through 1.8.4 Stored XSS via Datum File Attachment Uploads
    cvelistv5