CVE-2026-110103
bbs-go through 4.4.6 Stored XSS via Image Upload Content-Type
- State
- Published
- Severity
- 5.1 Medium
- Published
- Oct 13, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 13, 2026
Description
bbs-go through 4.4.6 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML or SVG files by spoofing the multipart Content-Type in POST /api/upload. Attackers can upload script-bearing documents served inline from /res and send their URLs to administrators, executing script on the forum's origin.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
bbs-gomlogclub |
|
References
- https://github.com/mlogclub/bbs-go/issues/305issue-trackingtechnical-description
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/uploader/uploader.go#L90-L121technical-description
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/api/upload_handlers.go#L36-L54technical-description
- https://github.com/mlogclub/bbs-go/pull/306patchissue-tracking
- https://github.com/mlogclub/bbs-go/commit/5bebf98bb9e0ac5162d4f8faf7a65fc0d496a362patch
- VulnCheck Advisory: bbs-go through 4.4.6 Stored XSS via Image Upload Content-Typethird-party-advisory
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