CVE-2025-40899CWE-79cross-site-scripting

CVE-2025-40899

High · published April 15, 2026

CVSS v3.1
8.9
EPSS
0%
Percentile
20.2
In the wild
Unconfirmed
What it is

A Stored Cross-Site Scripting vulnerability was discovered in the Assets and Nodes functionality due to improper validation of an input parameter. An authenticated user with custom fields privileges can define a malicious custom field containing a JavaScript payload. When the victim views the Assets or Nodes pages, the XSS executes in their browser context, allowing the attacker to perform unauthorized actions as the victim, such as modify application data, disrupt application availability, and access limited sensitive information.

The record
Technical detail
CVSS v3.1
8.9 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00288 · 20.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-15T13:16Z
References (2)
EPSS history
Timeline
  • 15 APR 08:18Z
    Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
    cvelistv5