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CVSS: 3.7EPSS: 0%CPEs: 1EXPL: 0

Nextcloud server is a self hosted personal cloud system. In affected versions OAuth codes did not expire. When an attacker would get access to an authorization code they could authenticate at any time using the code. As of version 28.0.0 OAuth codes are invalidated after 10 minutes and will no longer be authenticated. To exploit this vulnerability an attacker would need to intercept an OAuth code from a user session. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wppc-f5g8-vx36 https://github.com/nextcloud/server/pull/40766 https://hackerone.com/reports/1784162 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S6PN4GVJ5TZUC6WSG4X3ZA3AMPBEKNAX • CWE-613: Insufficient Session Expiration •

CVSS: 8.1EPSS: 0%CPEs: 10EXPL: 0

NextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server versions 25.0.0 until 25.0.7 and 26.0.0 until 26.0.2 and Nextcloud Enterprise Server versions 21.0.0 until 21.0.9.12, 22.0.0 until 22.2.10.12, 23.0.0 until 23.0.12.7, 24.0.0 until 24.0.12.2, 25.0.0 until 25.0.7, and 26.0.0 until 26.0.2, when two server are registered as trusted servers for each other and successfully exchanged the share secrets, the malicious server could modify or delete VCards in the system addressbook on the origin server. This would impact the available and shown information in certain places, such as the user search and avatar menu. If a manipulated user modifies their own data in the personal settings the entry is fixed again. Nextcloud Server n 25.0.7 and 26.0.2 and Nextcloud Enterprise Server 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7, and 26.0.2 contain a patch for this issue. A workaround is available. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7f7-535f-7q87 https://github.com/nextcloud/server/pull/38247 https://hackerone.com/reports/1976754 • CWE-284: Improper Access Control •

CVSS: 9.0EPSS: 0%CPEs: 8EXPL: 0

Nextcloud server is an open source home cloud implementation. In affected versions a missing scope validation allowed users to create workflows which are designed to be only available for administrators. Some workflows are designed to be RCE by invoking defined scripts, in order to generate PDFs, invoking webhooks or running scripts on the server. Due to this combination depending on the available apps the issue can result in a RCE at the end. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h3c9-cmh8-7qpj https://github.com/nextcloud/server/commit/5a06b50b10cc9278bbe68bbf897a0c4aeb0c4e60 • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •

CVSS: 7.5EPSS: 0%CPEs: 9EXPL: 0

Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to creation of paths outside of ones own space and overwriting data from other users with crafted paths. This issue has been addressed in versions 25.0.2, 24.0.8, and 23.0.12. Users are advised to upgrade. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-273v-9h7x-p68v https://github.com/nextcloud/server/pull/35074 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •

CVSS: 5.3EPSS: 0%CPEs: 2EXPL: 1

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Nextcloud Server prior to 24.0.8 and 23.0.12 and Nextcloud Enterprise server prior to 24.0.8 and 23.0.12 are vulnerable to server-side request forgery (SSRF). Attackers can leverage enclosed alphanumeric payloads to bypass IP filters and gain SSRF, which would allow an attacker to read crucial metadata if the server is hosted on the AWS platform. Nextcloud Server 24.0.8 and 23.0.2 and Nextcloud Enterprise Server 24.0.8 and 23.0.12 contain a patch for this issue. No known workarounds are available. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mqrx-grp7-244m https://github.com/nextcloud/server/pull/34160 https://hackerone.com/reports/1702864 • CWE-918: Server-Side Request Forgery (SSRF) •