CVE-2023-45151

highpriority · track · 35OT risk · elevatedEPSS 0.006 · 49 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.61% (49th) EPSS

CVSS 8.8 · high

Is it mine?

10 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 platform. Affected versions of Nextcloud stored OAuth2 tokens in plaintext which allows an attacker who has gained access to the server to potentially elevate their privilege. This issue has been addressed and users are recommended to upgrade their Nextcloud Server to version 25.0.8, 26.0.3 or 27.0.1. There are no known workarounds for this vulnerability.

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 · 6.5–8.8

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

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 1.2 · impact 5.2

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.

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-312USprimaryCWE-312US

affected products (10)

Products and version ranges known to be affected.

nextcloud security-advisories25.0.0, → 25.0.8enisa_euvdEU
nextcloud security-advisories26.0.0, → 26.0.3enisa_euvdEU
nextcloud security-advisories27.0.0, → 27.0.1enisa_euvdEU
Nextcloud GmbH Nextcloud Server≤ 27.0.0fstec_bduRU
Nextcloud GmbH Nextcloud Server25.0.0 → 25.0.10fstec_bduRU
Nextcloud GmbH Nextcloud Server26.0.0 → 26.0.5fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
nextcloud nextcloud server25.0.0 → 25.0.8nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server26.0.0 → 26.0.3nvdUScpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
nextcloud nextcloud server= 27.0.0nvdUScpe: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 2023-10-16modified 2026-06-17

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references (10)

External citations — patches, advisories, analysis.

scry

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