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Advisories

LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification

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Severity
high
Date
Affecting

  • LangBot <= 4.11.0

CWE
  • CWE-345 Insufficient Verification of Data Authenticity
CVSS
8.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
George Chen
Description
LangBot through 4.11.0 contains a missing authenticity verification vulnerability that allows unauthenticated attackers to inject forged Lark/Feishu events by skipping signature checks. Attackers knowing a bot UUID can POST fabricated im.message.receive_v1 or card.action.trigger events to drive the LLM pipeline, tools, and approvals as other users.

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