CVE-2026-110103 Details
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.
A stored cross-site scripting vulnerability has been identified in bbs-go versions through 4.4.6. This vulnerability allows authenticated users to upload HTML or SVG files by falsifying the multipart Content-Type in POST requests to /api/upload. The uploaded files, which can contain scripts, are served inline from the /res directory. If an administrator receives the URL of such a file, the script will execute in the context of the forum's origin.
Users are advised to update to the latest version of bbs-go, where this vulnerability has been addressed. Instructions for updating can be found in the project's documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 13, 2026CISA-ADP
Assessed Oct 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/handlers/api/upload_handlers.go#L36-L54 | [email protected] | Source CodeVendor |
| https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/uploader/uploader.go#L90-L121 | [email protected] | Source CodeVendor |
| https://github.com/mlogclub/bbs-go/commit/5bebf98bb9e0ac5162d4f8faf7a65fc0d496a362 | [email protected] | Source CodeVendor |
| https://github.com/mlogclub/bbs-go/issues/305 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/mlogclub/bbs-go/pull/306 | [email protected] | Issue TrackingVendor |
| https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-stored-xss-via-image-upload-content-type | [email protected] | AdvisoryBundle |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| mlogclub bbs-go | <= 4.4.6 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 14, 2026 | CVE Modified | CISA-ADP |
| Oct 13, 2026 | New CVE Received | [email protected] |