What is CVE-2018-25349?

CVE-2018-25349 is a medium-severity vulnerability in Userspice, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-23.

How severe is CVE-2018-25349?

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

XSS in Userspice

CVE-2018-25349

userSpice 4.3.24 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the X-Forwarded-For HTTP header. Attackers can send crafted requests to the backup.php endpoint with XSS payloads in t…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.0th 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

Userspice — versions 4.3.24

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2018-25349?: CVE-2018-25349 is a medium-severity vulnerability in Userspice, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-23.
How severe is CVE-2018-25349?: Medium severity. CVSS v3 base score is 6.1 out of 10.