CVE-2025-40904CWE-79cross-site-scripting

CVE-2025-40904

Medium · published May 19, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
7.7
In the wild
Unconfirmed
What it is

A Stored HTML Injection vulnerability was discovered in the Smart Polling functionality due to improper validation of an input parameter. An authenticated user with limited privileges can push malicious remote strategies containing HTML tags through the sync. When a victim views the affected remote strategy in the Smart Polling functionality, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00186 · 7.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-19T18:16Z
Affected products (2)
ProductVersionsFixed in
nozominetworks/cmc< 26.1.026.1.0
nozominetworks/guardian< 26.1.026.1.0
References (2)
EPSS history
Timeline
  • 19 MAY 13:23Z
    HTML injection in Smart Polling in Guardian/CMC before 26.1.0
    cvelistv5