CVE-2024-33879Network attack vector

Arbitrary file download and deletion via absolute paths

Published Jun 24, 2024 · Updated Aug 2, 2024

Absolute path traversal in VirtoSoftware Virto Bulk File Download 5.5.44 allows remote attackers to download or delete arbitrary files. The isCompleted method in Virto.SharePoint.FileDownloader/Api/Download.ashx accepts an absolute pathname through the path parameter without restricting it to the intended file area. No authentication or user interaction is required, and access remains bounded by the files available to the SharePoint-hosted component.

CVSS severity9.8
Critical
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Absolute path traversal in VirtoSoftware Virto Bulk File Download 5.5.44 allows remote attackers to download or delete arbitrary files. The isCompleted method in Virto.SharePoint.FileDownloader/Api/Download.ashx accepts an absolute pathname through the path parameter without restricting it to the intended file area. No authentication or user interaction is required, and access remains bounded by the files available to the SharePoint-hosted component.

The record

CVE
CVE-2024-33879
Published
Jun 24, 2024
Updated
Aug 2, 2024
Vendor
VirtoSoftware
Product
Virto Bulk File Download
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 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=5.5.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VirtoSoftware · Virto Bulk File Downloadversion=5.5.44

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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