Administrator token theft via malicious HTML upload
Published Jun 9, 2026 · Updated Jun 9, 2026
Stored XSS in Skilja GmbH Vinna Process Monitor 4.0 Service Pack 1 Build 63255 allows remote authenticated users to steal administrator tokens. The Media import feature stores an uploaded HTML file without neutralizing embedded JavaScript, which executes when an administrator opens its link. Low-privilege authentication permits the upload, but token theft also requires an administrator to follow the stored file link; the stolen token grants administrative application access.
Summary
What happened
Stored XSS in Skilja GmbH Vinna Process Monitor 4.0 Service Pack 1 Build 63255 allows remote authenticated users to steal administrator tokens. The Media import feature stores an uploaded HTML file without neutralizing embedded JavaScript, which executes when an administrator opens its link. Low-privilege authentication permits the upload, but token theft also requires an administrator to follow the stored file link; the stolen token grants administrative application access.
The record
- CVE
- CVE-2026-41031
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Skilja GmbH
- Product
- Vinna Process Monitor
- Classifications
- CWE-79, T1539
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=3.1.2 <4.0.6
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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