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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (16.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Vertigis Fm
- Vertigis Fm — versions 0
Weakness classification (CWE)
References
- www.redguard.ch/blog/2026/04/01/advisory-vertigis-vertigisfm/ (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.