CVE-2023-28643

highpriority · track · 35EPSS 0.008 · 56 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.79% (56th) EPSS

CVSS 8.8 · high

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Nextcloud server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–8.8

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 2.1 · impact 3.4

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-706USprimaryCWE-706US

affected products (9)

Products and version ranges known to be affected.

nextcloud security-advisories≤ < 24.0.9enisa_euvdEU
nextcloud security-advisories25.0.0, → 25.0.3enisa_euvdEU
Nextcloud GmbH Nextcloud Enterprise Server24.0.0 → 24.0.9fstec_bduRU
Nextcloud GmbH Nextcloud Enterprise Server25.0.0 → 25.0.3fstec_bduRU
Nextcloud GmbH Nextcloud Server24.0.0 → 24.0.9fstec_bduRU
Nextcloud GmbH Nextcloud Server25.0.0 → 25.0.3fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
nextcloud nextcloud server24.0.0 → 24.0.9nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server25.0.0 → 25.0.3nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2023-03-30modified 2026-06-17

related (190)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2025-24813US	critical9.8OT critical	99.9% (100th)	KEV	2025-03-10
Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Defau…
CVE-2021-40539US	critical9.8OT critical	99.0% (100th)	KEV	2021-09-07
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
CVE-2020-15505US	critical9.8OT critical	99.7% (100th)	KEV	2020-07-07
A remote code execution vulnerability in MobileIron Core & Connector versions 10.3.0.3 and earlier, 10.4.0.0, 10.4.0.1, 10.4.0.2, 10.4.0.3, 10.5.1.0, 10.5.2.0 and 10.6.0.0; and Sen…
CVE-2021-40856US	high7.5	50.1% (99th)	—	2021-12-13
Auerswald COMfortel 1400 IP and 2600 IP before 2.8G devices allow Authentication Bypass via the /about/../ substring.
CVE-2019-0571US	high7.8	15.8% (97th)	Exploit	2019-01-08
An elevation of privilege vulnerability exists when the Windows Data Sharing Service improperly handles file operations, aka "Windows Data Sharing Service Elevation of Privilege Vu…

+185 more

references (10)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan