CVE-2025-12268Public exploitNetwork attack vector

Authenticated arbitrary file upload via client-side checks

Published Oct 27, 2025 · Updated Oct 27, 2025

Unrestricted file upload in LearnHouse 98dfad76aad70711a8113f6c1fdabfccf10509ca allows remote authenticated users to upload arbitrary thumbnails. The /api/v1/courses/ course thumbnail handler relies on client-side file restrictions and accepts the thumbnail parameter without equivalent server-side type validation. A valid low-privilege session is required; the demonstrated consequence is storage of attacker-chosen content, not code execution.

CVSS severity9.8
Critical
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in LearnHouse 98dfad76aad70711a8113f6c1fdabfccf10509ca allows remote authenticated users to upload arbitrary thumbnails. The /api/v1/courses/ course thumbnail handler relies on client-side file restrictions and accepts the thumbnail parameter without equivalent server-side type validation. A valid low-privilege session is required; the demonstrated consequence is storage of attacker-chosen content, not code execution.

The record

CVE
CVE-2025-12268
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
LearnHouse
Product
LearnHouse
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 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?

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  1. Affected versionversion=98dfad76aad70711a8113f6c1fdabfccf10509ca

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LearnHouse · LearnHouseversion=98dfad76aad70711a8113f6c1fdabfccf10509ca

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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