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Vulnerability record · CVE-2023-48305 · published 21 November 2023

CVE-2023-48305: Nextcloud server cleartext storage of sensitive data vulnerability

Nextcloud · Nextcloud Server

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, when the log level was set to debug, the user_ldap app logged user passwords in plaintext into the log file. If the log file was then leaked or shared in any way the users' passwords would be leaked. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. As a workaround, change config setting `loglevel` to `1` or higher (should always be higher than 1 in production environments).

4.4 CVSS 3.1 Medium EPSS 0.25% · top 85.7% CWE-312 · Cleartext storage of sensitive data
4.4CVSS 3.1 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, when the log level was set to debug, the user_ldap app logged user passwords in plaintext into the log file. If the log file was then leaked or shared in any way the users' passwords would be leaked. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. As a workaround, change config setting `loglevel` to `1` or higher (should always be higher than 1 in production environments).

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

Affected products

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

References

LinkTags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35p6-4992-w5fr Vendor Advisory
https://github.com/nextcloud/server/issues/38461 ExploitIssue Tracking
https://github.com/nextcloud/server/pull/40013 Issue TrackingPatch
https://hackerone.com/reports/2101165 ExploitThird Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35p6-4992-w5fr Vendor Advisory
https://github.com/nextcloud/server/issues/38461 ExploitIssue Tracking
https://github.com/nextcloud/server/pull/40013 Issue TrackingPatch
https://hackerone.com/reports/2101165 ExploitThird Party Advisory

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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-2023-48305), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.