CVE-2026-28274
Received Received - Intake
Stored XSS in Initiative Document Upload Allows Credential Theft

Publication date: 2026-02-26

Last updated on: 2026-02-27

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2026-02-26
Last Modified
2026-02-27
Generated
2026-06-16
AI Q&A
2026-02-27
EPSS Evaluated
2026-06-14
NVD
CVE-2026-28274
EUVD
EUVD-2026-8919
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
morelitea initiative to 0.32.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
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Executive Summary

This vulnerability affects the Initiative project management platform versions prior to 0.32.4. It is a Stored Cross-Site Scripting (XSS) issue in the document upload functionality. Users with upload permissions can upload malicious .html or .htm files that contain embedded JavaScript. Because these files are served under the application's origin without proper sandboxing, the malicious scripts execute in the context of the application.

This means that the attacker can run scripts that steal sensitive information such as authentication tokens and session cookies from users who access the malicious file.

Impact Analysis

The vulnerability can lead to the theft of sensitive data like authentication tokens and session cookies, which can allow attackers to impersonate users or gain unauthorized access to the application.

Since the malicious file is hosted under the application's domain, simply sharing the direct link to the uploaded file can trigger the execution of the malicious script, potentially affecting any user who accesses it.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade the Initiative application to version 0.32.4 or later, as this version fixes the Stored Cross-Site Scripting (XSS) issue in the document upload functionality.

Additionally, restrict upload permissions within the "Initiatives" section to trusted users only, and consider disabling the upload of `.html` or `.htm` files until the upgrade is applied.

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