CVE-2017-20101Public exploitNetwork attack vector

Authenticated file disclosure via unchecked object identifiers

Published Jun 27, 2022 · Updated Apr 15, 2025

Information disclosure in ProjectSend r754 allows remote authenticated users to download another client's private files through ZIP download requests. The process.php zip_download action trusts user-supplied client and file identifiers without confirming that the requested objects belong to the signed-in client. A low-privilege account and interaction with the download workflow are required; successful exploitation reads other clients' assigned data.

CVSS severity3.5
Low
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ProjectSend r754 allows remote authenticated users to download another client's private files through ZIP download requests. The process.php zip_download action trusts user-supplied client and file identifiers without confirming that the requested objects belong to the signed-in client. A low-privilege account and interaction with the download workflow are required; successful exploitation reads other clients' assigned data.

The record

CVE
CVE-2017-20101
Published
Jun 27, 2022
Updated
Apr 15, 2025
Vendor
ProjectSend
Product
ProjectSend
Classifications
CWE-639, CWE-200, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=r754

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ProjectSend · ProjectSendversion=r754

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:P/I:N/A:N
5.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

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

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1213Data from Information Repositories

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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