CVE-2026-28274
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Lifecycle Timeline
3Tags
Description
Initiative is a self-hosted project management platform. Versions of the application prior to 0.32.4 are vulnerable to Stored Cross-Site Scripting (XSS) in the document upload functionality. Any user with upload permissions within the "Initiatives" section can upload a malicious `.html` or `.htm` file as a document. Because the uploaded HTML file is served under the application's origin without proper sandboxing, the embedded JavaScript executes in the context of the application. As a result, authentication tokens, session cookies, or other sensitive data can be exfiltrated to an attacker-controlled server. Additionally, since the uploaded file is hosted under the application's domain, simply sharing the direct file link may result in execution of the malicious script when accessed. Version 0.32.4 fixes the issue.
Analysis
Stored XSS in Initiative project management platform versions before 0.32.4 allows authenticated users with upload permissions to execute arbitrary JavaScript by uploading malicious HTML files that are served without sandboxing under the application's origin. An attacker can exploit this to steal authentication tokens, session cookies, and other sensitive data from other users, or trick them into executing malicious scripts by sharing direct file links. …
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Remediation
Within 24 hours: Disable document upload functionality in Initiative or restrict access to trusted users only, and inventory all Initiative deployments with affected versions. Within 7 days: Monitor for exploitation attempts in access logs, implement input validation rules at the WAF level to block suspicious file uploads, and communicate risk status to stakeholders. …
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External POC / Exploit Code
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