traQ: XSS in the User Uploaded File Retrieval API

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63197
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-03 19:18:08 UTC
Updated2026-11-03 23:17:50 UTC
DescriptiontraQ 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.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

EPSS: 0.002860000 probability, percentile 0.212940000 (date 2026-11-04)

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TraPtitech TraQ affected < 3.28.3 Not specified

References

ReferenceSourceLinkTags
github.com/traPtitech/traQ/security/advisories/GHSA-p74g-f95m-7fx7 [email protected] github.com
github.com/traPtitech/traQ/releases/tag/v3.28.3 [email protected] github.com
github.com/traPtitech/traQ/commit/3db29e7771661f6418d88d186d8ff7817f5d6b6e [email protected] github.com
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