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Vulnerabilities CVE-2025-40904

CVE-2025-40904

Medium
Open
TLP:CLEAR

HTML injection in Smart Polling in Guardian/CMC before 26.1.0

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Description

A Stored HTML Injection vulnerability was discovered in the Smart Polling functionality due to improper validation of an input parameter. An authenticated user with limited privileges can push malicious remote strategies containing HTML tags through the sync. When a victim views the affected remote strategy in the Smart Polling functionality, 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
5.1
EPSS Score
0.19%

8.4th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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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