What is CVE-2026-3877?

CVE-2026-3877 is a medium-severity vulnerability in Vertigis Fm, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-01.

How severe is CVE-2026-3877?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Vertigis Fm

CVE-2026-3877

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Vertigis Fm
Vertigis Fm — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

vulnerability@ncsc.ch (Exploit, technical-description, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-3877?: CVE-2026-3877 is a medium-severity vulnerability in Vertigis Fm, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-01.
How severe is CVE-2026-3877?: Medium severity. CVSS v3 base score is 6.1 out of 10.