CVE-2025-53865: Roundup XSS Vulnerability in Issue Tracker Templates
Summary
CVE-2025-53865: In Roundup before 2.5.0, XSS can occur via interaction between URLs and issue tracker templates (devel and responsive). Affects roundup versions < 2.5.0. Fixed in 2.5.0. How to fix ↓
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Background
Roundup is an open-source issue-tracking system that allows users to manage and track issues efficiently. It provides features such as customizable issue templates, user management, and various reporting options. However, prior to version 2.5.0, Roundup is vulnerable to cross-site scripting (XSS) attacks due to improper handling of URLs in its issue tracker templates, specifically in the development and responsive templates.
Vulnerability Detail
In Roundup versions before 2.5.0, an XSS vulnerability exists that can be exploited through the interaction of URLs and issue tracker templates. This vulnerability allows an attacker to inject malicious scripts into the application, which can be executed in the context of the user's browser. The ramifications of this vulnerability include potential data theft, session hijacking, and unauthorized actions performed on behalf of the user, making it critical to address.
How To Fix
Latest published version: 2.6.0 as of 22 Oct 2026
pip install --upgrade "roundup==2.6.0"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
2.5.0
This is the first release that contains the fix.
pip install --upgrade "roundup==2.5.0"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If you are unable to update to the patched version immediately, consider disabling the affected templates or restricting access to the issue tracker until the update can be applied. This can help mitigate the risk of exploitation.
Conclusion
CVE-2025-53865 represents a significant security risk for users of the Roundup issue-tracking system prior to version 2.5.0. It is crucial to update to the latest version to protect against potential XSS attacks. Additionally, utilizing tools like Vulert can help in monitoring for such vulnerabilities in your projects.
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FAQ
CVE-2025-53865 is a cross-site scripting (XSS) vulnerability found in the Roundup issue-tracking system prior to version 2.5.0.
If you are using Roundup version 2.4.9 or earlier, your installation is vulnerable to CVE-2025-53865.
Exploitation of this vulnerability can lead to data theft, session hijacking, and unauthorized actions performed on behalf of users.
You can update Roundup by running the command pip install --upgrade roundup in your terminal.
Yes, you can use Vulert to monitor and alert in real-time for open-source vulnerabilities in your software. You can check if your application is affected by this vulnerability using the Vulert playground at Vulert Scanner without any signup.
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