Vulnerability record · CVE-2023-45151 · published 16 October 2023

CVE-2023-45151: Nextcloud server cleartext storage of sensitive data vulnerability

Nextcloud · Nextcloud Server

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.

8.8 CVSS 3.1 High EPSS 0.48% · top 60.8% CWE-312 · Cleartext storage of sensitive data

8.8CVSS 3.1 base score

0.48%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Nextcloud Server Nextcloud

References

Link	Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9	Vendor Advisory
https://github.com/nextcloud/server/pull/38398	Issue TrackingPatch
https://hackerone.com/reports/1994324	Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9	Vendor Advisory
https://github.com/nextcloud/server/pull/38398	Issue TrackingPatch
https://hackerone.com/reports/1994324	Permissions Required

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-45151), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.