CVE-2025-57805Public exploitNetwork attack vector

Unauthenticated article publication via client-side authorization

Published Aug 25, 2025 · Updated Aug 26, 2025

Improper input validation in The Scratch Channel tsc-web-client 1 and 1.1 allows remote attackers to publish arbitrary articles. The article-creation endpoint accepts a multipart POST containing a Markdown file while trusting frontend-only checks for author, date, and category. No authentication is required, so an internet-reachable endpoint permits direct publication under an arbitrary author, category, and date.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in The Scratch Channel tsc-web-client 1 and 1.1 allows remote attackers to publish arbitrary articles. The article-creation endpoint accepts a multipart POST containing a Markdown file while trusting frontend-only checks for author, date, and category. No authentication is required, so an internet-reachable endpoint permits direct publication under an arbitrary author, category, and date.

The record

CVE
CVE-2025-57805
Published
Aug 25, 2025
Updated
Aug 26, 2025
Vendor
The Scratch Channel
Product
tsc-web-client
Classifications
CWE-20, T1190, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1, < 1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Scratch Channel · tsc-web-clientversion=>= 1, < 1.2

Published CVSS scores

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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