CVE-2023-28835

Nextcloud server is an open source home cloud implementation. In affected versions the generated fallback password when creating a share was using a weak complexity random number generator, so when the sharer did not change it the password could be guessable to an attacker willing to brute force it. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. This issue only affects users who do not have a password policy enabled, so enabling a password policy is an effective mitigation for users unable to upgrade.

• CWE-338

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9Vendor Advisory
• https://github.com/nextcloud/server/pull/36093Issue Tracking, Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9Vendor Advisory
• https://github.com/nextcloud/server/pull/36093Issue Tracking, Patch

Published

Mar 30, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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