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CVE-2026-110103— bbs-go through 4.4.6 Stored XSS via Image Upload Content-Type

Quick assessment

Affected
mlogclub bbs-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

bbs-go through 4.4.6 存在一个存储型跨站脚本（XSS）漏洞，攻击者可以通过在 POST /api/upload 请求中伪造 multipart 的 Content-Type，以认证用户的身份上传 HTML 或 SVG 文件。这些带有脚本内容的文件可由 /res 路径以内联方式提供，攻击者可将文件链接发送给论坛管理员，从而在论坛的源上下文中执行恶意脚本。

CVSS 5.4 · Medium EPSS 0.23% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
mlogclub bbs-go ≤ 4.4.6 affected
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I. Basic Information for CVE-2026-110103

Vulnerability Information
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Vulnerability Title
bbs-go through 4.4.6 Stored XSS via Image Upload Content-Type
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mlogclub bbs-go 0 ~ 4.4.6 -

II. Public POCs for CVE-2026-110103

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III. Intelligence Information for CVE-2026-110103

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Patches & Fixes for CVE-2026-110103 (4)

Vendor Advisories for CVE-2026-110103 (1)

Proof of Concept for CVE-2026-110103 (1)

IV. Related Vulnerabilities

Same product: bbs-go
Same vendor: mlogclub
Same weakness: CWE-79

V. Comments for CVE-2026-110103

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