CVE-2023-48305 Nextcloud Server user_ldap app logs user passwords in the log file on level debug

Medium 4.2 Published 21 Nov 2023 Updated 27 Nov 2024

Nextcloud Server logs plaintext user passwords when debug logging is enabled, exposing credentials if log files are leaked.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-48305?

CVE-2023-48305 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 21 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official 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).

Weakness: CWE-312

Which versions are affected by CVE-2023-48305?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2023-48305?

No fix has been published for CVE-2023-48305 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-48305 being exploited?

There is no known exploitation of CVE-2023-48305 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-35p6-4992-w5fr.