CVE-2023-28834Public exploitNetwork attack vector

Authenticated data-directory path disclosure via provisioning API

Published Apr 3, 2023 · Updated Feb 11, 2025

Information disclosure in affected Nextcloud Server and Enterprise Server releases allows remote authenticated users to read the data-directory path. The provisioning API's cloud/user endpoint includes storageLocation in ordinary user-data responses instead of restricting that field to administrators. A valid account and a single GET request suffice; affected ranges are 24.0.0 through 24.0.9 and 25.0.0 through 25.0.3, plus Enterprise 23.0.0 through 23.0.13, 24.0.0 through 24.0.9, and 25.0.0 through 25.0.3.

CVSS severity3.5
Low
EPSS probability0.81%
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 affected Nextcloud Server and Enterprise Server releases allows remote authenticated users to read the data-directory path. The provisioning API's cloud/user endpoint includes storageLocation in ordinary user-data responses instead of restricting that field to administrators. A valid account and a single GET request suffice; affected ranges are 24.0.0 through 24.0.9 and 25.0.0 through 25.0.3, plus Enterprise 23.0.0 through 23.0.13, 24.0.0 through 24.0.9, and 25.0.0 through 25.0.3.

The record

CVE
CVE-2023-28834
Published
Apr 3, 2023
Updated
Feb 11, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-212
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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=>= 23.0.0, < 23.0.14
  2. Affected versionversion=>= 24.0.0, < 24.0.10
  3. Affected versionversion=>= 25.0.0, < 25.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 23.0.0, < 23.0.14; version=>= 24.0.0, < 24.0.10; version=>= 25.0.0, < 25.0.4

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.5GitHub, Inc.CVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer

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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