CVE-2026-28274 Initiative Vulnerable to Token Theft via Stored XSS in Document Uploads
Attackers can steal authentication tokens and session cookies by uploading malicious HTML files that execute JavaScript in the application context.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-28274?
CVE-2026-28274 is a high-severity cross-site scripting vulnerability in Morelitea initiative, published on 26 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-28274?
It affects 1 product.
Products include Morelitea Initiative.
How do I fix CVE-2026-28274?
No fix has been published for CVE-2026-28274 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-28274 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28274 exists.
Other vulnerabilities in Morelitea initiative
Sources
Also known as GHSA-v38c-x27x-p584.