CVE-2024-31453Public exploitNetwork attack vector

Arbitrary file injection via unrestricted bucket uploads

Published Apr 9, 2024 · Updated Aug 2, 2024

Unrestricted file upload in psi-4ward PsiTransfer before 2.2.0 allows remote attackers to add arbitrary files to a shared bucket. The POST /files handler trusts the sid value in Upload-Metadata and creates an upload path for an existing distribution without authorizing new files. Possession of the distribution ID is sufficient; later visitors can receive attacker-supplied malicious or phishing files.

CVSS severity6.5
Medium
EPSS probability0.52%
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 psi-4ward PsiTransfer before 2.2.0 allows remote attackers to add arbitrary files to a shared bucket. The POST /files handler trusts the sid value in Upload-Metadata and creates an upload path for an existing distribution without authorizing new files. Possession of the distribution ID is sufficient; later visitors can receive attacker-supplied malicious or phishing files.

The record

CVE
CVE-2024-31453
Published
Apr 9, 2024
Updated
Aug 2, 2024
Vendor
psi-4ward
Product
PsiTransfer
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=0 <2.2.0
  2. Affected versionversion=< 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

psi-4ward · PsiTransferversion=0 <2.2.0; version=< 2.2.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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