CVE-2026-13536 GotoHTTP reg.12x cross site scripting
Remote attackers can inject malicious scripts via the sn parameter in GotoHTTP, potentially compromising user sessions or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-13536?
CVE-2026-13536 is a medium-severity cross-site scripting vulnerability in GotoHTTP, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability has been found in GotoHTTP up to 10.2. This issue affects some unknown processing of the file /reg.12x. The manipulation of the argument sn leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor explains: "We immediately removed unnecessary parameter echo from source code. However the URL in the issue description will never be used in browser nor exposed to user, so it will not bring secure problem in fact. So we don't upgrade server right now, it will be included in next version together with other features."
Which versions are affected by CVE-2026-13536?
How do I fix CVE-2026-13536?
No fix has been published for CVE-2026-13536 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-2026-13536 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13536 exists.
Sources
Also known as GHSA-63j7-9hp3-gp4j.