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CVE-2026-118691medium6.3

xianyu-auto-reply-fix through 2.0.7 Unauthenticated Message Sending via /send-message

Impact

xianyu-auto-reply-fix through 2.0.7 has a missing authorization vulnerability, allowing unauthenticated attackers to send messages from other users' accounts. Attackers can use a publicly known default API secret and another user's cookie_id to send arbitrary messages. The weakness is due to initialization with an insecure default.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

GuDong2003 · VulnCheck

xianyu-auto-reply-fix

1 range
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affected

0 → through 2.0.7

semver versions

unaffected

unknown

Other versions: unaffected

Original source description

xianyu-auto-reply-fix through 2.0.7 contains a missing authorization vulnerability in the POST /send-message endpoint that allows unauthenticated attackers to send messages from other users' accounts using publicly known default API secrets. Attackers can supply the hard-coded api_key and another user's cookie_id, plus chosen chat_id, to_user_id and message values, to send arbitrary Xianyu messages to buyers from that merchant account.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-118691

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1188 ↗

Initialization of a Resource with an Insecure Default

VulnCheck

Related →
Contributing organizations · 1
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Assigning organization

2026-10-28

What changed

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References

6 sources
github.com/GuDong2003/xianyu-auto-reply-fix/commit/999cfe61c401322d9893eb81ad1a76beabba6cfb
patchVulnCheck
github.com/GuDong2003/xianyu-auto-reply-fix/issues/116
issue-trackingVulnCheck
github.com/GuDong2003/xianyu-auto-reply-fix
productVulnCheck
github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/reply_server.py
technical-descriptionVulnCheck
github.com/GuDong2003/xianyu-auto-reply-fix/blob/v2.0.7/db_manager.py
technical-descriptionVulnCheck
www.vulncheck.com/advisories/xianyu-auto-reply-fix-through-2.0.7-unauthenticated-message-sending-via-send-message
third-party-advisoryVulnCheck