CVSS: 8.8EPSS: 0%CPEs: 5EXPL: 0CVE-2023-28833 – Unrestricted filenames for logo or favicon as admin in the theming settings in nextcloud server
https://notcve.org/view.php?id=CVE-2023-28833
Nextcloud server is an open source home cloud implementation. In affected versions admins of a server were able to upload a logo or a favicon and to provided a file name which was not restricted and could overwrite files in the appdata directory. Administrators may have access to overwrite these files by other means but this method could be exploited by tricking an admin into uploading a maliciously named file. It is recommended that the Nextcloud Server is upgraded to 24.0.10 or 25.0.4. Users unable to upgrade should avoid ingesting logo files from untrusted sources. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ch7f-px7m-hg25 https://github.com/nextcloud/server/pull/36095 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-434: Unrestricted Upload of File with Dangerous Type •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-28644 – Reference fetch can saturate the server bandwidth for 10 seconds in nextcloud server
https://notcve.org/view.php?id=CVE-2023-28644
Nextcloud server is an open source home cloud implementation. In releases of the 25.0.x branch before 25.0.3 an inefficient fetch operation may impact server performances and/or can lead to a denial of service. This issue has been addressed and it is recommended that the Nextcloud Server is upgraded to 25.0.3. There are no known workarounds for this vulnerability. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9wmj-gp8v-477j https://github.com/nextcloud/server/pull/36016 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 8.8EPSS: 0%CPEs: 4EXPL: 1CVE-2023-28643 – Potential share collision for recipients when caching is enabled in nextcloud server
https://notcve.org/view.php?id=CVE-2023-28643
Nextcloud server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhq4-4pr8-wm27 https://github.com/nextcloud/server/issues/34015 https://github.com/nextcloud/server/pull/36047 • CWE-706: Use of Incorrectly-Resolved Name or Reference •
CVSS: 9.0EPSS: 0%CPEs: 8EXPL: 0CVE-2023-26482 – Scope of workflow operations is not validated in nextcloud server
https://notcve.org/view.php?id=CVE-2023-26482
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: 7.1EPSS: 0%CPEs: 7EXPL: 0CVE-2023-25818 – Missing brute force protection on password reset token in Nextcloud Server
https://notcve.org/view.php?id=CVE-2023-25818
Nextcloud server is an open source, personal cloud implementation. In affected versions a malicious user could try to reset the password of another user and then brute force the 62^21 combinations for the password reset token. As of commit `704eb3aa` password reset attempts are now throttled. Note that 62^21 combinations would significant compute resources to brute force. None the less 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-v243-x6jc-42mp https://github.com/nextcloud/server/pull/36489 https://github.com/nextcloud/server/pull/36489/commits/704eb3aa6cecc0a646f5cca4290b595f493f9ed3 • CWE-307: Improper Restriction of Excessive Authentication Attempts •