CVE-2025-40899 PUBLISHED

Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0

Assigner: Nozomi
Reserved: 16.04.2025 Published: 15.04.2026 Updated: 15.04.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L
CVSS Score: 7.1

Product Status

Vendor Nozomi Networks
Product Guardian
Versions Default: unaffected
  • affected from 0 to 26.0.0 (excl.)
Vendor Nozomi Networks
Product CMC
Versions Default: unaffected
  • affected from 0 to 26.0.0 (excl.)

Workarounds

Review existing custom fields.

Solutions

Upgrade to v26.0.0 or later.

Credits

  • This issue was found by Andrea Palanca of Nozomi Networks Product Security team during an internal investigation. finder

References

Problem Types

  • CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE

Impacts

  • CAPEC-592 Stored XSS