CVE-2023-48307

criticalpriority · track · 39EPSS 0.009 · 58 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (58th) EPSS

CVSS 9.8 · critical

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · cert_bund

EPSS · scored 2026-10-27

Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Starting in version 1.13.0 and prior to version 2.2.8 and 3.3.0, an attacker can use an unprotected endpoint in the Mail app to perform a SSRF attack. Nextcloud Mail app versions 2.2.8 and 3.3.0 contain a patch for this issue. As a workaround, disable the mail app.

cvss

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

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–critical · 3.5–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.13.5lowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Lsecondary · security-advisories@github.comexploitability 2.1 · impact 1.4

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-918US

affected products (4)

Products and version ranges known to be affected.

nextcloud security-advisories1.13.0, → 2.2.8enisa_euvdEU
nextcloud security-advisories3.1.0, → 3.3.0enisa_euvdEU
nextcloud mail1.13.0 → 2.2.8nvdUScpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*
nextcloud mail3.0.0 → 3.3.0nvdUScpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2973Nextcloud: Mehrere SchwachstellenDeutsch2023-11-20csaf · cert_bundDE
Ein entfernter, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um einen Denial of Service Angriff durchzuführen, um einen Denial of Service Zustand herbeizuführen, Informationen offenzulegen, Dateien zu manipulieren, einen Cross-Site-Scripting-Angriff durchzuführen oder Sicherheitsvorkehrungen zu umgehen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd cert_bund NVD CVE.org MITRE

published 2023-11-21modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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