TI-2025-27285 Aliases CVE-2025-40891 GHSA-q3xp-m695-72w5

HTML injection in in Time Machine functionality in Guardian/CMC before 25.5.0

LOW 11CWE-79Published 2025-12-18 · Updated 2026-08-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: High
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00175 6th percentileScored 2026-11-07

Fix Fixed Guardian (Nozomi Networks): 25.5.0CMC (Nozomi Networks): 25.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Nozomi Networks	Guardian	before 25.5.0	25.5.0	Patch available	CNA
Nozomi Networks	CMC	before 25.5.0	25.5.0	Patch available	CNA

Guardian VendorNozomi Networks Affected before 25.5.0 Fixed in 25.5.0 Patch available CNA
CMC VendorNozomi Networks Affected before 25.5.0 Fixed in 25.5.0 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:nozominetworks:cmc::::::::	before 25.5.0	Vulnerable	Nozomi Networks
cpe:2.3:a:nozominetworks:guardian::::::::	before 25.5.0	Vulnerable	Nozomi Networks

cpe:2.3:a:nozominetworks:cmc:*:*:*:*:*:*:*:* Versions before 25.5.0 Vulnerable ·Nozomi Networks
cpe:2.3:a:nozominetworks:guardian:*:*:*:*:*:*:*:* Versions before 25.5.0 Vulnerable ·Nozomi Networks

Remediation

Fix · CNA Guardian (Nozomi Networks) Fixed in 25.5.0
Fix · CNA CMC (Nozomi Networks) Fixed in 25.5.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-12-18
Nozomi Networks CMC, Guardian 25.5.0
4 records Highest priority Priority LOW 4 LOW
Other records, highest priority first
- TI-2025-27292 Path traversal in Import Arc data archive functionality in Guardian/CMC before 25.5.0Priority LOW 34
- TI-2025-27286 Stored Cross-Site Scripting (XSS) in Reports in Guardian/CMC before 25.5.0Priority LOW 33
- TI-2025-27287 HTML injection in Asset List in Guardian/CMC before 25.5.0Priority LOW 23
Show all 4 records →

Timeline

2026-10-02 Threatist record created from CVE-2025-40891
2026-10-03 Alias added: GHSA-q3xp-m695-72w5

References

Advisory 1

https://security.nozominetworks.com/NN-2025:12-01

TI-2022-00470 Authenticated RCE on project configuration import in Guardian/CMC before 22.0.0 CVSS 4.0HIGH 8.6
TI-2026-24526 DoS through oversized audit log entries in Guardian/CMC before 26.2.0 CVSS 4.0HIGH 8.7
TI-2023-15926 DoS on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0 CVSS 4.0HIGH 8.2
TI-2023-13657 SQL Injection on IDS parsing of malformed asset fields in Guardian/CMC >= 22.6.0 before 22.6.3 and 23.1.0 CVSS 4.0CRITICAL 9.2
TI-2023-09405 Authenticated Blind SQL Injection on alerts count in Guardian/CMC before 22.6.2 CVSS 4.0HIGH 8.7
TI-2023-02399 Authenticated SQL Injection on Query functionality in Guardian/CMC before 22.6.3 and 23.1.0 CVSS 4.0HIGH 8.7

See all 37 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences