CVE-2018-3775

CVE-2018-3775 concerns Nextcloud Server prior to version 12.0.3, where an attacker with valid user credentials could bypass two‑factor authentication due to improper authentication. The NVD entry lists CVSSv3.1 impact as high (C/H/I/H/A/H) and CVSSv2 as medium (I/P, no confidentiality/availabilit...

CVE-2018-3761

Nextcloud Server before 12.0.8 and 13.0.3 is affected by an improper authentication flaw at the OAuth2 token endpoint. The root cause is missing checks that could allow issuing new tokens if the OAuth2 client was partly compromised. Public disclosures reference CVE-2018-3761, with vendor advisori...

CVE-2018-16467

CVE-2018-16467 (Nextcloud Server before 14.0.0) is an improper access‑control vulnerability enabling unauthenticated attackers to bypass password protection for previews of single-file shares via the vulnerable publicpreview.php endpoint. The issue can disclose previews (notably image files) with...

CVE-2017-0936

CVE-2017-0936 affects Nextcloud Server prior to 11.0.7 and 12.0.5, where an Authorization Bypass Through User-Controlled Key vulnerability exists due to a missing ownership check. This allows logged-in users to change the scope of app passwords for other users. The app passwords themselves are no...

CVE-2018-3762

CVE-2018-3762 affects Nextcloud Server prior to 12.0.8 and 13.0.3, where improper checks of dropped permissions for incoming shares let a user request previews for files they should not access. Root cause: inadequate enforcement of access control on image preview requests. Impact stated in source...

CVE-2018-3780

CVE-2018-3780 detail (normal mode): Nextcloud’s autocomplete search results may expose a stored XSS due to missing sanitization in the autocomplete field. The flaw affects Nextcloud Server releases around 13.x (notably 13.0.5 and related updates) and can be triggered by crafted search results con...

CVE-2018-3776

CVE-2018-3776 affects Nextcloud Server; an improper input validator in affected versions prior to 12.0.3 and 11.0.5 could allow an attacker’s actions to bypass audit-logging. The vulnerability is documented across multiple sources (including Red Hat and OpenVAS feeds) and is described as a loggin...

CVE-2018-16463

CVE-2018-16463 describes a session-fixation bug in Nextcloud Server, affecting versions prior to 14.0.0, 13.0.3, and 12.0.8, which could allow an attacker to access password-protected shares. Core details provided indicate a vulnerability in Nextcloud Server’s session handling, with the public Ne...

CVE-2018-16465

Nextcloud Server is affected when used with versions prior to 14.0.0. The issue is a missing state that would have enforced a second factor at login if the 2FA provider failed to load, effectively allowing a 2FA bypass under certain conditions. This vulnerability is described in advisories NC-SA-...

CVE-2018-16466

CVE-2018-16466 affects Nextcloud Server prior to 14.0.0, 13.0.6, and 12.0.11. The root cause is improper revalidation of permissions, which can cause access restrictions to be bypassed via access tokens. The issue is documented in NC-SA-2018-010 (vendor fix). Affected versions include Nextcloud S...

CVE-2018-16464

CVE-2018-16464 affects Nextcloud Server prior to 14.0.0. A missing access check could allow continued access to password-protected link shares after the owner changes the password, enabling unauthorized access to shared resources. Remediation: upgrade to Nextcloud Server 14.0.0 or apply vendor ad...