CVE-2018-25349 — userSpice 4.3.24 Cross-Site Scripting via X-Forwarded-For Header

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MEDIUM

userSpice 4.3.24 Cross-Site Scripting via X-Forwarded-For Header

Published May 23, 2026

5.1

MEDIUM

CVSS 4.0

EPSS 0.15%

Description

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.

Affected products

Vendor UserSpice Product userSpice Default
n/a
- Version
  4.3.24
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

UserSpice

userSpice

n/a

Version	Status	Constraints
4.3.24	affected	-

Remediation

No remediation recorded yet.

Metrics

0.15% 0.00155

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00155

Score over time

May–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.15% (0.00155)	3.94th	v5 (v2026.06.15)
Jun 15, 2026	0.20% (0.00203)	10.29th	v5 (v2026.06.15)
May 24, 2026	0.03% (0.00027)	8.14th	v4 (v2025.03.14)

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://www.exploit-db.com/exploits/44871
exploit
https://www.vulncheck.com/advisories/userspice-cross-site-scripting-via-x-forwarded-for-header
third-party-advisory

Link	Providers	Tags
https://www.exploit-db.com/exploits/44871		exploit
https://www.vulncheck.com/advisories/userspice-cross-site-scripting-via-x-forwarded-for-header		third-party-advisory