CVE-2023-28997

mediumpriority · track · 26EPSS 0.011 · 65 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.07% (65th) EPSS

CVSS 6.5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.

cvss

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

6.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 1.2 · impact 5.2

v3.16.7mediumCVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.7mediumCVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 0.4 · impact 5.8

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-323US

affected products (5)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Nextcloud Nextcloud <3.6.5 Desktopall versionscert_bundDE
nextcloud nextcloud< 3.6.5 Desktopcert_bundDE
nextcloud security-advisories3.0.0, → 3.6.5enisa_euvdEU
nextcloud desktop3.0.0 → 3.6.5nvdUScpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0847Nextcloud: Mehrere Schwachstellen ermöglichen Manipulation von DateienDeutsch2023-04-04csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Dateien zu manipulieren.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-04-04modified 2026-06-17

references (11)

External citations — patches, advisories, analysis.

scry

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