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Description

A Stored HTML Injection vulnerability was discovered in the Time Machine Snapshot Diff functionality due to improper validation of network traffic data. An unauthenticated attacker can send specially crafted network packets at two different times to inject HTML tags into asset attributes across two snapshots. Exploitation requires a victim to use the Time Machine Snapshot Diff feature on those specific snapshots and perform specific GUI actions, at which point the injected HTML renders in their browser, enabling phishing and open redirect attacks. Full XSS exploitation is prevented by input validation and Content Security Policy. Attack complexity is high due to multiple required conditions.

PUBLISHED Reserved 2025-04-16 | Published 2025-12-18 | Updated 2025-12-18 | Assigner Nozomi




LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

MEDIUM: 4.7CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Default status
unaffected

Any version before 25.5.0
affected

Default status
unaffected

Any version before 25.5.0
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-2025:12-01

cve.org (CVE-2025-40891)

nvd.nist.gov (CVE-2025-40891)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.