Nextcloud Server vulnerabilities

CVE-2020-8152 [MEDIUM] CWE-522 CVE-2020-8152: Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an att Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the public key to decrypt them later on.

CVE-2020-8133 [MEDIUM] CWE-657 CVE-2020-8133: A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an a A wrong generation of the passphrase for the encrypted block in Nextcloud Server 19.0.1 allowed an attacker to overwrite blocks in a file.

CVE-2020-8150 [MEDIUM] CWE-310 CVE-2020-8150: A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption sch A cryptographic issue in Nextcloud Server 19.0.1 allowed an attacker to downgrade the encryption scheme and break the integrity of encrypted files.

CVE-2020-8183 [HIGH] CWE-256 CVE-2020-8183: A logic error in Nextcloud Server 19.0.0 caused a plaintext storage of the share password when it wa A logic error in Nextcloud Server 19.0.0 caused a plaintext storage of the share password when it was given on the initial create API call.

CVE-2020-8236 [MEDIUM] CWE-287 CVE-2020-8236: A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless Web A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but not verifying it.

CVE-2020-8173 [LOW] CWE-310 CVE-2020-8173: A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed de A too small set of random characters being used for encryption in Nextcloud Server 18.0.4 allowed decryption in shorter time than intended.

CVE-2020-8223 [MEDIUM] CWE-269 CVE-2020-8223: A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to r A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.

CVE-2020-8154 [HIGH] CWE-639 CVE-2020-8154: An Insecure direct object reference vulnerability in Nextcloud Server 18.0.2 allowed an attacker to An Insecure direct object reference vulnerability in Nextcloud Server 18.0.2 allowed an attacker to remote wipe devices of other users when sending a malicious request directly to the endpoint.

CVE-2020-8155 [MEDIUM] CWE-79 CVE-2020-8155: An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-sit An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF.

CVE-2020-8139 [MEDIUM] CWE-284 CVE-2020-8139: A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-down A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.

CVE-2020-8138 [MEDIUM] CWE-918 CVE-2020-8138: A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 al A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a malicious calendar URL.

CVE-2020-8121 [HIGH] CWE-284 CVE-2020-8121: A bug in Nextcloud Server 14.0.4 could expose more data in reshared link shares than intended by the A bug in Nextcloud Server 14.0.4 could expose more data in reshared link shares than intended by the sharer.

CVE-2019-15613 [HIGH] CWE-20 CVE-2019-15613: A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file ext A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file extension when checking file mimetypes.

CVE-2019-15616 [MEDIUM] CWE-93 CVE-2019-15616: Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long. Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long.

CVE-2019-15623 [MEDIUM] CWE-359 CVE-2019-15623: Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and Exposure of Private Information in Nextcloud Server 16.0.1 causes the server to send it's domain and user IDs to the Nextcloud Lookup Server without any further data when the Lookup server is disabled.

CVE-2019-15621 [MEDIUM] CWE-281 CVE-2019-15621: Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare wi Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.

CVE-2019-15624 [MEDIUM] CWE-20 CVE-2019-15624: Improper Input Validation in Nextcloud Server 15.0.7 allows group admins to create users with IDs of Improper Input Validation in Nextcloud Server 15.0.7 allows group admins to create users with IDs of system folders.

CVE-2020-8117 [MEDIUM] CWE-280 CVE-2020-8117: Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leake Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leaked when sharing a non-public event.

CVE-2019-15617 [MEDIUM] CWE-287 CVE-2019-15617: A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when tr A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.

CVE-2020-8120 [MEDIUM] CWE-79 CVE-2020-8120: A reflected Cross-Site Scripting vulnerability in Nextcloud Server 16.0.1 was discovered in the svg A reflected Cross-Site Scripting vulnerability in Nextcloud Server 16.0.1 was discovered in the svg generation.