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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-82644— WWBN AVideo Brute-force Rate Limiting Bypass via Missing User-Agent

Quick assessment

Affected
WWBN AVideo
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.

WWBN AVideo（当前版本 e01e41ecc 及更早版本）存在一个暴力破解速率限制绕过漏洞。该漏洞位于 函数中，该函数负责保护 及其他 13 个接口。 函数通过一个缓存层（ ）来存储尝试次数计数器。然而，该缓存层会静默丢弃那些被 识别为机器人的客户端的写入操作。由于 默认将缺失 User-Agent 头部的请求视为机器人，并且还会匹配常见的机器人标识符（如 'curl'、'bot'、'crawler'、'spider' 等），因此对于这类客户端，计数器永远不会递增，导致速率限制无法生效。 因此，未认证的攻击

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-82644

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
WWBN AVideo Brute-force Rate Limiting Bypass via Missing User-Agent
Source: CVE Program / CVE List V5
Vulnerability Description
WWBN AVideo (current e01e41ecc and earlier) contains a brute-force rate limiting bypass in enforceRateLimit(), which protects login.json.php and 13 other endpoints. The function stores its attempt counter via a cache layer (ObjectYPT::setCacheGlobal) that silently discards writes for any client identified as a bot by isBot(). Because isBot() treats a missing User-Agent header as a bot by default — and also matches common bot identifiers such as 'curl', 'bot', 'crawler', and 'spider' — the counter never increments for such clients, so the rate limit never fires. An unauthenticated attacker can therefore submit unlimited login attempts (e.g., by omitting the User-Agent header or using curl's default User-Agent), enabling unrestricted password-guessing attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WWBN AVideo - -

II. Public POCs for CVE-2026-82644

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-82644

请登录查看更多情报信息。

Other References for CVE-2026-82644 (2)

Same Patch Batch · WWBN · 2026-08-30 · 6 CVEs total

CVE-2026-82645 8.6 HIGH AVideo Unauthenticated Stream Credential Disclosure via Forgeable Token
CVE-2026-82648 7.1 HIGH WWBN AVideo SSRF Filter Bypass via NAT64 Hex Address
CVE-2026-82643 6.5 MEDIUM WWBN AVideo Unauthenticated Rate Limit Bypass via preauthorize.json.php
CVE-2026-82646 6.1 MEDIUM WWBN AVideo Unauthenticated Reflected XSS via url2Embed.json.php
CVE-2026-82647 6.1 MEDIUM WWBN AVideo Cross-Site Request Forgery via sendEmail.json.php

IV. Related Vulnerabilities

Same product: AVideo
Same vendor: WWBN
Same weakness: CWE-307

V. Comments for CVE-2026-82644

No comments yet

Leave a comment