Nextcloud Server vulnerabilities

CVE-2020-8122 [MEDIUM] CWE-284 CVE-2020-8122: A missing check in Nextcloud Server 14.0.3 could give recipient the possibility to extend the expira A missing check in Nextcloud Server 14.0.3 could give recipient the possibility to extend the expiration date of a share they received.

CVE-2019-15619 [MEDIUM] CWE-79 CVE-2019-15619: Improper neutralization of file names, conversation names and board names in Nextcloud Server 16.0.3 Improper neutralization of file names, conversation names and board names in Nextcloud Server 16.0.3, Nextcloud Talk 6.0.3 and Nextcloud Deck 0.6.5 causes an XSS when linking them with each others in a project.

CVE-2020-8119 [MEDIUM] CWE-285 CVE-2020-8119: Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-d Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app.

CVE-2019-15612 [MEDIUM] CWE-384 CVE-2019-15612: A bug in Nextcloud Server 15.0.2 causes pending 2FA logins to not be correctly expired when the pass A bug in Nextcloud Server 15.0.2 causes pending 2FA logins to not be correctly expired when the password of the user is reset.

CVE-2020-8118 [MEDIUM] CWE-918 CVE-2020-8118: An authenticated server-side request forgery in Nextcloud server 16.0.1 allowed to detect local and An authenticated server-side request forgery in Nextcloud server 16.0.1 allowed to detect local and remote services when adding a new subscription in the calendar application.

CVE-2019-15618 [MEDIUM] CWE-79 CVE-2019-15618: Missing escaping of HTML in the Updater of Nextcloud 15.0.5 allowed a reflected XSS when starting th Missing escaping of HTML in the Updater of Nextcloud 15.0.5 allowed a reflected XSS when starting the updater from a malicious location.

CVE-2019-5449 [MEDIUM] CWE-287 CVE-2019-5449: A missing check in the Nextcloud Server prior to version 15.0.1 causes leaking of calendar event nam A missing check in the Nextcloud Server prior to version 15.0.1 causes leaking of calendar event names when adding or modifying confidential or private events.

CVE-2019-5451 [MEDIUM] CWE-288 CVE-2019-5451: Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the file Bypass lock protection in the Nextcloud Android app prior to version 3.6.1 allows accessing the files when repeatedly opening and closing the app in a very short time.

CVE-2018-16466 [HIGH] CWE-284 CVE-2018-16466: Improper revalidation of permissions in Nextcloud Server prior to 14.0.0, 13.0.6 and 12.0.11 lead to Improper revalidation of permissions in Nextcloud Server prior to 14.0.0, 13.0.6 and 12.0.11 lead to not accepting access restrictions by acess tokens.

CVE-2018-16467 [MEDIUM] CWE-200 CVE-2018-16467: A missing check in Nextcloud Server prior to 14.0.0 could give unauthorized access to the previews o A missing check in Nextcloud Server prior to 14.0.0 could give unauthorized access to the previews of single file password protected shares.

CVE-2018-16464 [MEDIUM] CWE-287 CVE-2018-16464: A missing access check in Nextcloud Server prior to 14.0.0 could lead to continued access to passwor A missing access check in Nextcloud Server prior to 14.0.0 could lead to continued access to password protected link shares when the owner had changed the password.

CVE-2018-16465 [MEDIUM] CWE-287 CVE-2018-16465: Missing state in Nextcloud Server prior to 14.0.0 would not enforce the use of a second factor at lo Missing state in Nextcloud Server prior to 14.0.0 would not enforce the use of a second factor at login if the the provider of the second factor failed to load.

CVE-2018-16463 [LOW] CWE-384 CVE-2018-16463: A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentia A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.

CVE-2018-3780 [MEDIUM] CWE-79 CVE-2018-3780: A missing sanitization of search results for an autocomplete field in NextCloud Server <13.0.5 could A missing sanitization of search results for an autocomplete field in NextCloud Server <13.0.5 could lead to a stored XSS requiring user-interaction. The missing sanitization only affected user names, hence malicious search results could only be crafted by authenticated users.

CVE-2018-3775 [HIGH] CWE-287 CVE-2018-3775: Improper Authentication in Nextcloud Server prior to version 12.0.3 would allow an attacker that obt Improper Authentication in Nextcloud Server prior to version 12.0.3 would allow an attacker that obtained user credentials to bypass the 2 Factor Authentication.

CVE-2018-3776 [MEDIUM] CWE-20 CVE-2018-3776: Improper input validator in Nextcloud Server prior to 12.0.3 and 11.0.5 could lead to an attacker's Improper input validator in Nextcloud Server prior to 12.0.3 and 11.0.5 could lead to an attacker's actions not being logged in the audit log.

CVE-2018-3761 [HIGH] CWE-287 CVE-2018-3761: Nextcloud Server before 12.0.8 and 13.0.3 suffer from improper authentication on the OAuth2 token en Nextcloud Server before 12.0.8 and 13.0.3 suffer from improper authentication on the OAuth2 token endpoint. Missing checks potentially allowed handing out new tokens in case the OAuth2 client was partly compromised.

CVE-2018-3762 [MEDIUM] CWE-284 CVE-2018-3762: Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for in Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to.

CVE-2017-0936 [MEDIUM] CWE-639 CVE-2017-0936: Nextcloud Server before 11.0.7 and 12.0.5 suffers from an Authorization Bypass Through User-Controll Nextcloud Server before 11.0.7 and 12.0.5 suffers from an Authorization Bypass Through User-Controlled Key vulnerability. A missing ownership check allowed logged-in users to change the scope of app passwords of other users. Note that the app passwords themselves where neither disclosed nor could the error be misused to identify as another user.

CVE-2017-0894 [MEDIUM] CWE-285 CVE-2017-0894: Nextcloud Server before 11.0.3 is vulnerable to disclosure of valid share tokens for public calendar Nextcloud Server before 11.0.3 is vulnerable to disclosure of valid share tokens for public calendars due to a logical error. Thus granting an attacker potentially access to publicly shared calendars without knowing the share token.