CVE-2023-34354 Cross-site scripting in Surf SOHO HW1

Low 3.4 Published 11 Oct 2023 Updated 4 Nov 2025

An authenticated attacker can inject arbitrary JavaScript into the router's brand upload feature, potentially compromising other users' browsers.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-34354?

CVE-2023-34354 is a low-severity cross-site scripting vulnerability in Peplink Surf SOHO HW1, published on 11 Oct 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

A stored cross-site scripting (XSS) vulnerability exists in the upload_brand.cgi functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to execution of arbitrary javascript in another user's browser. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-79, CWE-80

Which versions are affected by CVE-2023-34354?

It affects 1 product.

Products include Peplink Surf Soho Firmware.

How do I fix CVE-2023-34354?

No fix has been published for CVE-2023-34354 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-34354 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34354 exists.

Sources

Also known as GHSA-qr2h-wj83-58jc.