CVE-2023-25579Network attack vector

Cross-user file overwrite via path misnormalization

Published Feb 22, 2023 · Updated Mar 10, 2025

Path traversal in Nextcloud Server before 23.0.12, before 24.0.8, and before 25.0.2 allows remote authenticated users to overwrite files. OC\Files\Node\Folder::getFullPath() checks a path before normalizing it, so crafted paths passed through newFile() or newFolder() escape the user's storage space. Exploitation requires low-privileged network access and user interaction, and it can overwrite another user's data.

CVSS severity5.5
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Nextcloud Server before 23.0.12, before 24.0.8, and before 25.0.2 allows remote authenticated users to overwrite files. OC\Files\Node\Folder::getFullPath() checks a path before normalizing it, so crafted paths passed through newFile() or newFolder() escape the user's storage space. Exploitation requires low-privileged network access and user interaction, and it can overwrite another user's data.

The record

CVE
CVE-2023-25579
Published
Feb 22, 2023
Updated
Mar 10, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-31, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record 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=< 23.0.12
  2. Affected versionversion=>= 24.0.0, < 24.0.8
  3. Affected versionversion=>= 25.0.0, < 25.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=< 23.0.12; version=>= 24.0.0, < 24.0.8; version=>= 25.0.0, < 25.0.2

Published CVSS scores

5.5NextcloudCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/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 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-31Path Traversal: 'dir....filename'
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo