CVE-2023-43803

Arbitrary file deletion via unvalidated plugin names

Published Oct 18, 2023 · Updated Feb 13, 2025

Path traversal in Arduino Cloud Agent 1.3.2 and earlier allows local users to delete arbitrary files through a crafted HTTP request. The /v2/pkgs/tools/installed handler constructs a deletion path from an untrusted plugin name without confining the resolved path to the tools directory. Exploitation requires localhost HTTP access or a CORS bypass, and deletion is limited to paths writable by the account running the agent.

CVSS severity6.1
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Arduino Cloud Agent 1.3.2 and earlier allows local users to delete arbitrary files through a crafted HTTP request. The /v2/pkgs/tools/installed handler constructs a deletion path from an untrusted plugin name without confining the resolved path to the tools directory. Exploitation requires localhost HTTP access or a CORS bypass, and deletion is limited to paths writable by the account running the agent.

The record

CVE
CVE-2023-43803
Published
Oct 18, 2023
Updated
Feb 13, 2025
Vendor
Arduino
Product
Arduino Cloud Agent
Classifications
CWE-35, T1485
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=< 1.3.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arduino · Arduino Cloud Agentversion=< 1.3.3

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
6.1GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-35Path Traversal: '.../...//'
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

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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