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Description

A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, 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.

PUBLISHED Reserved 2025-04-16 | Published 2026-05-19 | Updated 2026-05-19 | Assigner Nozomi




MEDIUM: 4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

MEDIUM: 5.9CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

Problem types

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

Product status

Default status
unaffected

Any version before 26.1.0
affected

Default status
unaffected

Any version before 26.1.0
affected

Credits

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

References

security.nozominetworks.com/NN-2026:5-01

cve.org (CVE-2025-40902)

nvd.nist.gov (CVE-2025-40902)

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