CVE-2026-10234 Mettle sendportal Campaign webview cross site scripting
Remote attackers can inject malicious scripts via the Campaign Handler webview, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-10234?
CVE-2026-10234 is a medium-severity cross-site scripting vulnerability in Mettle sendportal, published on 1 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A vulnerability was detected in Mettle sendportal up to 3.0.1. This affects an unknown part of the file /webview/ of the component Campaign Handler. The manipulation of the argument content results in cross site scripting. The attack can be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-10234?
How do I fix CVE-2026-10234?
No fix has been published for CVE-2026-10234 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-2026-10234 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10234 exists.
Sources
Also known as GHSA-49hc-rwwc-mfv5.