CVE-2026-55730 Loytec LWEB802: Reflected Cross-Site Scripting in LWEB802
An unauthenticated remote attacker can execute arbitrary JavaScript in a victim's browser via a crafted link, potentially taking over the victim's session.
- 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-2026-55730?
CVE-2026-55730 is a high-severity cross-site scripting vulnerability in Loytec LWEB-802, published on 24 Jul 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
Reflected Cross-Site Scripting (CWE-79) in LWEB802 in Loytec LWEB-802 before 5.0.8 on all platforms allows an unauthenticated remote attacker to execute arbitrary JavaScript in a victim's browser and perform actions with the victim's privileges via a crafted link containing a malicious `project` or `mspParams` parameter.
Which versions are affected by CVE-2026-55730?
How do I fix CVE-2026-55730?
No fix has been published for CVE-2026-55730 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-2026-55730 being exploited?
There is no known exploitation of CVE-2026-55730 in the wild and no public exploit code.
Sources
Also known as GHSA-8c38-mwr2-hj5c.