A gupnp security update has been released for Arch Linux.

ASA-202105-26: gupnp: information disclosure

Arch Linux Security Advisory ASA-202105-26
=========================================
Severity: Medium
Date : 2021-05-25
CVE-ID : CVE-2021-33516
Package : gupnp
Type : information disclosure
Remote : Yes
Link :   https://security.archlinux.org/AVG-1985

Summary
======
The package gupnp before version 1.2.6-1 is vulnerable to information
disclosure.

Resolution
=========
Upgrade to 1.2.6-1.

# pacman -Syu "gupnp>=1.2.6-1"

The problem has been fixed upstream in version 1.2.6.

Workaround
=========
None.

Description
==========
An issue was discovered in GUPnP before 1.2.5. It allows DNS rebinding.
A remote web server can exploit this vulnerability to trick a victim's
browser into triggering actions against local UPnP services implemented
using this library. Depending on the affected service, this could be
used for data exfiltration, data tampering, etc.

Impact
=====
A remote attacker can use DNS rebinding to trick a victim's browser
into triggering actions against local UPnP services.

References
=========
  https://discourse.gnome.org/t/security-relevant-releases-for-gupnp-issue-cve-2021-33516/6536
  https://gitlab.gnome.org/GNOME/gupnp/-/issues/24
  https://gitlab.gnome.org/GNOME/gupnp/-/merge_requests/13
  https://gitlab.gnome.org/GNOME/gupnp/-/commit/ca6ec9dcb26fd7a2a630eb6a68118659b589afac
  https://security.archlinux.org/CVE-2021-33516