CVE-2024-37884Network attack vector

Historical file deletion via missing permission check

Published Jun 14, 2024 · Updated Sep 3, 2024

Improper access control in Nextcloud Server allows remote authenticated users to delete versions of read-only shared files. LegacyVersionsBackend::deleteVersion called Storage::deleteRevision without checking the requesting user's delete permission on the source file. A valid account and read-only share are required; deletion permanently removes selected historical versions while leaving the current file intact.

CVSS severity3.5
Low
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Nextcloud Server allows remote authenticated users to delete versions of read-only shared files. LegacyVersionsBackend::deleteVersion called Storage::deleteRevision without checking the requesting user's delete permission on the source file. A valid account and read-only share are required; deletion permanently removes selected historical versions while leaving the current file intact.

The record

CVE
CVE-2024-37884
Published
Jun 14, 2024
Updated
Sep 3, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-284, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 26.0.0, < 26.0.13
  2. Affected versionversion=>= 27.0.0, < 27.1.8
  3. Affected versionversion=>= 28.0.0, < 28.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 26.0.0, < 26.0.13; version=>= 27.0.0, < 27.1.8; version=>= 28.0.0, < 28.0.4

Published CVSS scores

3.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1485Data Destruction

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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