Stored Cross-Site Scripting Vulnerability in bbs-go by Mlogclub
CVE-2026-110103

5.1MEDIUM

Key Information:

Vendor

Mlogclub

Status
Bbs-go
Vendor
CVE Published:
13 October 2026

What is CVE-2026-110103?

The bbs-go application, version 4.4.6, contains a stored cross-site scripting vulnerability that can be exploited by authenticated users. By manipulating the multipart Content-Type in the POST request to /api/upload, attackers can upload maliciously crafted HTML or SVG files. These files can then be served inline from the /res directory, allowing attackers to execute scripts from the forum's origin when their URLs are shared with administrators. This vulnerability poses a significant risk to the security and integrity of the forum, as it can facilitate unauthorized access and data theft.

Affected Version(s)

bbs-go 0 <= 4.4.6

References

https://github.com/mlogclub/bbs-go/issues/305
issue-trackingtechnical-description
https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/p...
technical-description
https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/h...
technical-description

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.