Vendor
Nextcloud
306 known vulnerabilities.
Nextcloud at a glance
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
| Oct 2026 | 9 | 0 |
| Sep 2026 | 9 | 0 |
| Aug 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Jun 2026 | 26 | 0 |
| May 2026 | 1 | 0 |
| Apr 2026 | 0 | 0 |
| Mar 2026 | 0 | 0 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 20 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 1 | 0 |
| Sep 2025 | 0 | 0 |
| Aug 2025 | 0 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 5 | 0 |
| Apr 2025 | 0 | 0 |
| Mar 2025 | 0 | 0 |
| Feb 2025 | 0 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
Products
Latest advisories
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Medium max 7.5
Nextcloud (Server, Tables, Whiteboard, Files Confidential, Collectives, Richdocuments): Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren oder offenzulegen sowie Denial-of-Service-Zustände auszulösen.
first Oct 26, 2026 -
Medium max 6.5WID-SEC-2026-3840 5 CVEs
Nextcloud: Mehrere Schwachstellen
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen im Nextcloud Server und verschiedenen Apps ausnutzen, um Informationen offenzulegen, um Sicherheitsmechanismen zu umgehen und um einen Denial of Service herbeizuführen.
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MediumWID-SEC-2026-3439 0 CVEs
Nextcloud: Schwachstelle ermöglicht Codeausführung
Ein Angreifer kann eine Schwachstelle in Nextcloud ausnutzen, um beliebigen Programmcode auszuführen.
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MediumWID-SEC-2026-2685 0 CVEs
Nextcloud: Mehrere Schwachstellen
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen und Informationen offenzulegen.
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High max 8.1
Nextcloud: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen im Nextcloud Server und verschiedenen Apps ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um Dateien zu manipulieren.
first May 11, 2026
306 results · Feed
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Medium 5.3
App passwords were allowed to bypass password confirmation on sensitive endpoints.
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Low 3.5
A public shared collective always allowed recipients of the link to create pages.
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High 7.5
Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. T…
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Medium 4.3
A user could create a docx or odt file with a # in the filename with confidential information such as a credit card num…
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Low 3.5
A missing token type check allowed to retrieve more additional information about the WOPI configuration with a user or …
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Medium 4.6
The user in a group can bypass the group restriction set by an administrator on link sharing, creating share links for …
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Low 3.3
The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting use…
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Medium 4.3
When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("Y…
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Medium 4.6
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authenti…
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Low 2.4
The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and lin…
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Medium 6.5
File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no reco…
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Medium 6.5
A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowe…
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Medium 6.2
Circles' remote-instance signature verification fetches the attacker-supplied keyId URL before trust in the remote inst…
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Medium 4.3
The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without v…
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Low 3.1
After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships…
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Medium 4.3
The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing…
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Medium 6.5
The Photos app's filter-based "smart albums" build their file listing using the search configuration (photosSourceFolde…
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Medium 6.3
Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The …
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Medium 6.8
Nextcloud: Propfind requests for file comments allowed to load comments for other files
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file comment, to read the content…
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High 7.1
Nextcloud: Tables app allows limited SQLi in ORDER BY with malicious sort order argument for Table Views
Nextcloud is an open source content collaboration platform. From versions 0.9.0 to before 0.9.7, and 1.0.0 to before 1.0.2, a missing sanitization in the Tables app allowed a user with access to the tables app to perform a limited SQL injection in the ORDER B…
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Medium 5.9
Nextcloud: Bypass of second factor authentication on DAV endpoints
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie (created after successful password authentication but before TOTP completion) could be…
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Medium 5.9
Nextcloud: Two-Factor Authentication Bypass via Pending Session Token Replay
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authentication bypass vulnerability allowed attackers with knowledge of a user's password to circumvent two-…
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High 8.2
Nextcloud: SQL Injection in Column Type Parameter Allows Arbitrary SQL Execution
Nextcloud is an open source content collaboration platform. From versions 0.7.0 to before 0.7.7, 0.8.0 to before 0.8.10, 0.9.0 to before 0.9.8, and 1.0.0 to before 1.0.4, an authenticated attacker with access to the Tables app may be able to execute arbitrary…
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Medium 4.3
Nextcloud: Information Disclosure of view filter metdata via Broken Sensitive Data Masking in ViewService
Nextcloud is an open source content collaboration platform. From version 0.8.0 to before version 1.0.4, the view filter criteria is exposed to users with read-only permissions in Nextcloud Tables. This issue has been patched in versions 1.0.4 and 2.0.0.
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Medium 5.3
Nextcloud: Deleting a Forms collaborator share leaves uploaded response files accessible through a lingering Files share
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for form…
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Medium 4.3
Nextcloud: Calendar app leaked user identifiers via attendee suggestion endpoint
Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint for suggesting attendee…
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Medium 4.6
Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate
Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched i…
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Medium 6.4
Nextcloud: Hidden Public Link creation when sharing to a Team External Member
Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a user shares a folder or file with a Nextcloud Team that includes an external member (a person added via email address who do…
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Medium 6.3
Nextcloud: Files Lock app allows users to lock and unlock files of other users
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock request…
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Medium 6.5
Nextcloud: Logged-in user bypasses share password and download restrictions on Text attachments via documentId leads to unauthorized file access
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing pas…
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High 8.1
Nextcloud: Cross-Account Calendar Takeover via Unauthorized Group-Member-Set Update
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access …
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Medium 4.4
Nextcloud: Limited path traversal via template API if using `{lang}` in config
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.14, and 32.0.0 to before 32.0.4, if {lang} is used in the template directory config value, non-admin users can in some cases copy arbitrary fil…
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Low 3.3
Nextcloud: Open Redirect in user_oidc login flow via protocol-relative URL bypass
Nextcloud is an open source content collaboration platform. From version 6.1.0 to before version 8.2.2, an attacker can craft links that would redirect users to another website, when the victim uses the attackers link to log in via user OIDC. This issue has b…
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Low 3.3
Nextcloud: Information disclosure in Nextcloud Approval app via fileId parameter reveals workflow associations
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, authenticated users can check if arbitrary files are associated with specific approval workflows where they can request approval. This issue has been patched in version 2.7.2.
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Medium 6.5
Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results…
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Medium 6.5
Nextcloud: Missing permission check for from submissions
Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
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Low 3.5
Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling
Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patche…
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Low 3.5
Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able …
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Medium 6.3
Nextcloud: Valid share tokens allow to access tempory upload files of share owner
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a malicious user has access to a file share of a user, they could use this share token to also access the …
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High 8.1CVE-2026-45156 Public exploit
Nextcloud: Authentication Bypass in ID4me handling via Missing JWT Signature Verification in User OIDC
Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This …