Proxmox CVE

PMG: XSS in filename display in attachment quarantine

PSA-2026-00048-1 PMG

Affected packages

pmg-gui

Details

The filename field in the AttachementGrid component shown in the Attachment Quarantine view takes its data from the Content-Disposition header of the quarantined mail. The display field was not HTML-encoded allowing for an attacker to launch an XSS attack by sending a mail with prepared attachments.

The issue was privately reported by Điềm from VNPT-VCI.

Fixed in

  • pmg-gui >= 5.2.3

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