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Vulnerabilities CVE-2025-40903

CVE-2025-40903

Medium
Open
TLP:CLEAR

HTML injection in Schedule Restore Archive in Guardian/CMC before 26.1.0

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Description

A Stored HTML Injection vulnerability was discovered in the Schedule Restore Archive functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can define a malicious restore schedule containing HTML tags. When a victim views the affected schedule, 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.

Details

CVSS Score
4.8
EPSS Score
0.19%

9.4th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Confidence
90%
Published
May 19, 2026
Last Modified
Aug 11, 2026
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