CVE-2024-37315Network attack vector

Read-only file overwrite via unchecked version rollback

Published Jun 14, 2024 · Updated Aug 2, 2024

Improper access control in Nextcloud Server allows remote authenticated users to restore older versions of read-only shared files. LegacyVersionsBackend::rollback invoked Storage::rollback without first checking update permission on the version's source file. Exploitation requires read-only file access and the files_versions app; a successful rollback replaces the current document content.

CVSS severity4.3
Medium
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 access control in Nextcloud Server allows remote authenticated users to restore older versions of read-only shared files. LegacyVersionsBackend::rollback invoked Storage::rollback without first checking update permission on the version's source file. Exploitation requires read-only file access and the files_versions app; a successful rollback replaces the current document content.

The record

CVE
CVE-2024-37315
Published
Jun 14, 2024
Updated
Aug 2, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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, < 26.0.12
  2. Affected versionversion=>= 27.0.0, < 27.1.7
  3. Affected versionversion=>= 28.0.0, < 28.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 26.0.0, < 26.0.12; version=>= 27.0.0, < 27.1.7; version=>= 28.0.0, < 28.0.3

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.5GitHub Maintainer AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/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-284Improper Access Control
T1565.001Stored Data Manipulation

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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