CVE-2023-23943

mediumpriority · track · 17EPSS 0.009 · 60 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.92% (60th) EPSS

CVSS 4.3 · medium

Is it mine?

9 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

Nextcloud mail is an email app for the nextcloud home server platform. In affected versions the SMTP, IMAP and Sieve host fields allowed to scan for internal services and servers reachable from within the local network of the Nextcloud Server. It is recommended that the Nextcloud Maill app is upgraded to 1.15.0 or 2.2.2. The only known workaround for this issue is to completely disable the nextcloud mail app.

cvss

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

5.0

010

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

v3.14.3mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.14.3mediumAV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Nsecondary · ENISA EU

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.1 · impact 1.4

v3.14mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-918USCWE-918US

affected products (9)

Products and version ranges known to be affected.

Nextcloud Nextcloud desktop Client < 3.6.3all versionscert_bundDEcpe:/a:nextcloud:nextcloud:desktop_client__3.6.3
Nextcloud Nextcloud mail < 1.15.0all versionscert_bundDEcpe:/a:nextcloud:nextcloud:mail__1.15.0
Nextcloud Nextcloud mail < 2.2.2all versionscert_bundDEcpe:/a:nextcloud:nextcloud:mail__2.2.2
nextcloud security-advisories≤ < 1.15.0enisa_euvdEU
nextcloud security-advisories2.0.0, → 2.2.2enisa_euvdEU
Nextcloud GmbH Nextcloud mail≤ 1.15.0fstec_bduRU
Nextcloud GmbH Nextcloud mail2.2.0 → 2.2.2fstec_bduRU
nextcloud mail< 1.15.0nvdUScpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*
nextcloud mail2.2.0 → 2.2.2nvdUScpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0290Nextcloud: Mehrere SchwachstellenDeutsch2023-02-05csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Nextcloud bezüglich des Desktop-Clients und der Mail-Komponente ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen oder Informationen offenzulegen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-02-06modified 2026-06-17

references (16)

External citations — patches, advisories, analysis.

scry

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