CVSS: 4.3EPSS: 0%CPEs: 5EXPL: 2CVE-2023-28834 – Full path of data directory exposed to Nextcloud server users
https://notcve.org/view.php?id=CVE-2023-28834
Nextcloud Server is an open source personal cloud server. Nextcloud Server 24.0.0 until 24.0.6 and 25.0.0 until 25.0.4, as well as Nextcloud Enterprise Server 23.0.0 until 23.0.11, 24.0.0 until 24.0.6, and 25.0.0 until 25.0.4, have an information disclosure vulnerability. A user was able to get the full data directory path of the Nextcloud server from an API endpoint. By itself this information is not problematic as it can also be guessed for most common setups, but it could speed up other unknown attacks in the future if the information is known. Nextcloud Server 24.0.6 and 25.0.4 and Nextcloud Enterprise Server 23.0.11, 24.0.6, and 25.0.4 contain patches for this issue. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5w64-6c42-rgcv https://github.com/nextcloud/server/issues/33883 https://github.com/nextcloud/server/pull/36094 https://hackerone.com/reports/1690510 • CWE-212: Improper Removal of Sensitive Information Before Storage or Transfer •
CVSS: 7.5EPSS: 0%CPEs: 5EXPL: 0CVE-2023-28835 – Insecure randomness for default password in nextcloud
https://notcve.org/view.php?id=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. • https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w2p-rp9m-9xp9 https://github.com/nextcloud/server/pull/36093 • CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) •
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: 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') •