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 the X-Forwarded-For header that execute when administrators visit the audit log page.
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: 0.002 (3.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.9% 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: 0.002 · change: 0.000
Affected products
- Userspice — versions 4.3.24
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/44871 (exploit)
- www.vulncheck.com/advisories/userspice-cross-site-scripting-via-x-forwarded-for… (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.