CVE-2026-41031: A Stored Cross-Site Scripting (XSS) vulnerability occurs in Vinna Process Monitor

Synopsis

Stored Cross-Site Scripting (XSS) in Vinna Process Monitor (versions 3.1.2 through 4.0.5) allows a low-privilege authenticated attacker to inject malicious JavaScript into the application over the network, which executes when a victim user views the poisoned content. Successful exploitation steals administrative access tokens and session credentials, enabling full account takeover and compromise of dependent systems. A patched-image rebuild at version 4.0.6 is available on HarborGuard for environments running an affected version.

HarborGuard Coverage

Exploit Conditions

• Network reachabilityRequired

  The attacker must reach the Vinna Process Monitor service over the network to inject the malicious payload via the web interface.

• AuthenticationRequired

  Any low-privilege account is sufficient; the attacker must hold valid credentials but does not need administrative access.

• Victim interactionRequired

  A user (typically an administrator) must view the page or content containing the injected script for the payload to execute and steal credentials.

• Attack complexityDetail

  Exploitation is reliable and condition-free; no race conditions or special environmental factors are required to trigger the vulnerability.

Blast Radius

• Reads stored administrative session tokens and authentication credentials from the victim's browser context.
• Reads sensitive data from systems the Vinna Process Monitor application can access, given the stolen admin session (high confidentiality impact on scope-changed systems).
• Modifies application data and configuration through the stolen admin session, including persisted process monitor records and settings (high integrity impact on both the vulnerable component and scope-changed systems).
• Disrupts or corrupts dependent downstream systems connected to Vinna Process Monitor via the elevated admin session (high availability impact on scope-changed systems).