CVE-2026-121733

Medium CVSS 5.4

Published 2026-11-03 · last changed 2026-11-04

The fix

We hold no Microsoft remediation data for CVE-2026-121733, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Bagisto before 2.4.5 contains a stored cross-site scripting vulnerability that allows authenticated customers to upload HTML files via the RMA send-message endpoint without type or extension validation. Attackers can upload a .html attachment containing JavaScript served under /storage/rma-conversation/, executing script in the shop's origin when an administrator opens it.

Sources

NVD record for CVE-2026-121733

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N