traQ is a messenger application built for Digital Creators Club traP

Why it is Yellow

• CVSS 7.3 high

References

• https://github.com/traPtitech/traQ/commit/3db29e7771661f6418d88d186d8ff7817f5d6b6e
• https://github.com/traPtitech/traQ/releases/tag/v3.28.3
• https://github.com/traPtitech/traQ/security/advisories/GHSA-p74g-f95m-7fx7

Original description

traQ is a messenger application built for Digital Creators Club traP. Prior to 3.28.3, instances configured with TRAQ_STORAGE_TYPE=local can return user-uploaded SVG or HTML content from the /files/{fileId} retrieval endpoint for direct browser rendering. An attacker with file-upload capability can provide crafted active content and induce another user to open its file URL, causing attacker-controlled JavaScript to execute in the victim's browser. This issue is fixed in version 3.28.3.