CVE-2026-3877 Reflected Cross-Site Scripting in Dashboard Search
Attackers can execute arbitrary JavaScript in authenticated users' browsers via a malicious URL in the VertiGIS FM dashboard search.
- 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-2026-3877?
CVE-2026-3877 is a high-severity cross-site scripting vulnerability in VertiGIS FM, published on 1 Apr 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 reflected cross-site scripting (XSS) vulnerability in the dashboard search functionality of the VertiGIS FM solution allows attackers to craft a malicious URL, that if visited by an authenticated victim, will execute arbitrary JavaScript in the victim's context. Such a URL could be delivered through various means, for instance, by sending a link or by tricking victims to visit a page crafted by the attacker.
Weakness: CWE-79
Which versions are affected by CVE-2026-3877?
It affects 1 product.
Products include Vertigis Fm.
How do I fix CVE-2026-3877?
No fix has been published for CVE-2026-3877 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-2026-3877 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3877 exists.
Other vulnerabilities in VertiGIS FM
Sources
Also known as GHSA-mc25-w9g7-hq9v.