CVE-2024-52516Network attack vector

Persistent file access via undeleted shares

Published Nov 15, 2024 · Updated Nov 15, 2024

Improper privilege management in Nextcloud Server allows remote authenticated users to retain access to previously shared files. The DefaultShareProvider::userDeletedFromGroup path removed derived group shares but failed to delete direct user shares after the users no longer shared a permitted group. The condition requires group-only sharing, a prior direct share between group peers, and removal from the last mutual group; the former recipient can still read the file.

CVSS severity3.0
Low
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Nextcloud Server allows remote authenticated users to retain access to previously shared files. The DefaultShareProvider::userDeletedFromGroup path removed derived group shares but failed to delete direct user shares after the users no longer shared a permitted group. The condition requires group-only sharing, a prior direct share between group peers, and removal from the last mutual group; the former recipient can still read the file.

The record

CVE
CVE-2024-52516
Published
Nov 15, 2024
Updated
Nov 15, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-269, CAPEC-122, T1530
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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=>= 28.0.0, < 28.0.9
  2. Affected versionversion=>= 29.0.0, < 29.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 28.0.0, < 28.0.9; version=>= 29.0.0, < 29.0.5

Published CVSS scores

3.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
CAPEC-122Privilege Abuse
T1530Data from Cloud Storage

Public exploit references

No public exploit references are available in this record.

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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