What is CVE-2024-33879?

CVE-2024-33879 is a critical-severity vulnerability in Microsoft Sharepoint Server, classified under Path Traversal. CVSS score: 9.8/10. Published 2024-06-24.

How severe is CVE-2024-33879?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2024-33879 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Microsoft Sharepoint Server

CVE-2024-33879

An issue was discovered in VirtoSoftware Virto Bulk File Download 5.5.44 for SharePoint 2019. The Virto.SharePoint.FileDownloader/Api/Download.ashx isCompleted method allows arbitrary file download and deletion via absolute path traversal in the path parameter.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2024-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.7th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Microsoft Sharepoint Server — versions 2019
Virtosoftware Sharepoint Bulk File Download — versions 5.5.44

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2024-33879?: CVE-2024-33879 is a critical-severity vulnerability in Microsoft Sharepoint Server, classified under Path Traversal. CVSS score: 9.8/10. Published 2024-06-24.
How severe is CVE-2024-33879?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2024-33879 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.