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.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://security.nozominetworks.com/NN-2025:12-01 |
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History
Thu, 18 Dec 2025 15:15:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Thu, 18 Dec 2025 13:30:00 +0000
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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. | |
| Title | HTML injection in in Time Machine functionality in Guardian/CMC before 25.5.0 | |
| First Time appeared |
Nozomi Networks
Nozomi Networks cmc Nozomi Networks guardian |
|
| Weaknesses | CWE-79 | |
| CPEs | cpe:2.3:a:nozomi_networks:cmc:*:*:*:*:*:*:*:* cpe:2.3:a:nozomi_networks:guardian:*:*:*:*:*:*:*:* |
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| Vendors & Products |
Nozomi Networks
Nozomi Networks cmc Nozomi Networks guardian |
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| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Nozomi
Published:
Updated: 2025-12-18T14:32:26.508Z
Reserved: 2025-04-16T09:04:25.006Z
Link: CVE-2025-40891
Updated: 2025-12-18T14:31:51.882Z
Status : Awaiting Analysis
Published: 2025-12-18T14:15:59.270
Modified: 2025-12-18T15:07:18.427
Link: CVE-2025-40891
No data.
OpenCVE Enrichment
No data.