Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-103396— bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount

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 4.4.6 及更早版本中存在一个权限绕过漏洞，位于 AdminMiddleware 的授权逻辑中。该漏洞的原因是：只读的 权限规则在匹配 端点时，优先于预期的 规则生效。因此，仅拥有查看权限的已认证用户可以调用 端点，触发高开销的全表用户计数和缓存失效操作。通过反复并发执行这些数据库操作，攻击者可导致拒绝服务（DoS）。

CVSS 4.3 · Medium EPSS 0.29% · P19

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
mlogclub bbs-go ≤ 4.4.6 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-103396

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
bbs-go through 4.4.6 Incorrect Authorization via /api/admin/user/synccount
Source: CVE Program / CVE List V5
Vulnerability Description
bbs-go through 4.4.6 contains a permission bypass vulnerability in the AdminMiddleware authorization logic where the read-only dashboard.user.view permission rule matches the /api/admin/user/synccount endpoint before the intended dashboard.user.update rule. Authenticated users with only view permissions can call the synccount endpoint to trigger expensive full-table user recounts and cache invalidations, causing denial of service through repeated concurrent database operations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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-2026-103396

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-103396

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-103396 (1)

Vendor Advisories for CVE-2026-103396 (1)

Other References for CVE-2026-103396 (2)

IV. Related Vulnerabilities

Same weakness: CWE-863

V. Comments for CVE-2026-103396

No comments yet

Leave a comment