Vulnerability Report

CVE-2023-28833

Title: Nextcloud server file overwrite via logo/favicon upload

Arbitrary File Overwrite

Proof Of Concept

No public PoC currently indexed for CVE-2023-28833.

CWE Category CWE-434
Published Date Mar 30, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 2.4 CVSS v3.1
Exploit Probability (EPSS)
0.76%

Vulnerability Summary

CVE-2023-28833: Nextcloud server is an open source home cloud implementation. In affected versions admins of a server were able to upload a logo or a favicon and to provided a file name which was not restricted and could overwrite files in the appdata directory. Administrators may have access to overwrite these files by other means but this method could be exploited by tricking an admin into uploading a maliciously named file. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should avoid ingesting logo files from untrusted sources.

Impacted Vendors

N
nextcloud 1

Reference Links

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ch7f-px7m-hg25 https://github.com/nextcloud/server/pull/36095 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ch7f-px7m-hg25 https://github.com/nextcloud/server/pull/36095
CVSS v3.1
Source Entity [email protected]
Severity LOW
2.4
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-28833 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L

Affected Stack

No specific products linked.