Mikaelgundersen

**Name of the Vulnerable Software and Affected Versions** Nextcloud user oidc app versions prior to 1.3.5 Nextcloud user oidc app versions prior to 2.0.0 Nextcloud user oidc app versions prior to 3.0.0 Nextcloud user oidc app versions prior to 4.0.0 Nextcloud user oidc app versions prior to 5.0.0 **Description** The user oidc app is an OpenID Connect user backend for Nextcloud. An attacker could potentially trick the app into accepting a request that is not signed by the correct server. **Recommendations** For versions prior to 1.3.5, upgrade to version 1.3.5 or later. For versions prior to 2.0.0, upgrade to version 2.0.0 or later. For versions prior to 3.0.0, upgrade to version 3.0.0 or later. For versions prior to 4.0.0, upgrade to version 4.0.0 or later. For versions prior to 5.0.0, upgrade to version 5.0.0 or later.

**Name of the Vulnerable Software and Affected Versions** Traefik versions prior to 2.10.6 Traefik versions prior to 3.0.0-beta5 **Description** The issue arises when Traefik is configured to use the `HTTPChallenge` to generate and renew Let's Encrypt TLS certificates. The delay authorized to solve the challenge can be exploited by attackers to achieve a `slowloris attack`. **Recommendations** For versions prior to 2.10.6, upgrade to version 2.10.6 or later. For versions prior to 3.0.0-beta5, upgrade to version 3.0.0-beta5 or later. As a temporary workaround, consider replacing the `HTTPChallenge` with the `TLSChallenge` or the `DNSChallenge` until a patch is applied.

**Name of the Vulnerable Software and Affected Versions** Nextcloud Server versions 20.0.0 through 20.0.14.14 Nextcloud Server versions 21.0.0 through 21.0.9.12 Nextcloud Server versions 22.0.0 through 22.2.10.13 Nextcloud Server versions 23.0.0 through 23.0.12.7 Nextcloud Server versions 24.0.0 through 24.0.12.4 Nextcloud Server version 25.0.8 and earlier Nextcloud Server version 26.0.3 and earlier Nextcloud Server version 27.0.0 **Description** The issue is related to a missing password confirmation in Nextcloud Server, which allows an attacker to create app passwords for a victim after stealing a session from a logged-in user. This can be exploited by a remote attacker to modify the user's password. **Recommendations** For Nextcloud Server versions 20.0.0 through 20.0.14.14, update to version 20.0.14.15 or later. For Nextcloud Server versions 21.0.0 through 21.0.9.12, update to version 21.0.9.13 or later. For Nextcloud Server versions 22.0.0 through 22.2.10.13, update to version 22.2.10.14 or later. For Nextcloud Server versions 23.0.0 through 23.0.12.7, update to version 23.0.12.8 or later. For Nextcloud Server versions 24.0.0 through 24.0.12.4, update to version 24.0.12.5 or later. For Nextcloud Server version 25.0.8 and earlier, update to version 25.0.9 or later. For Nextcloud Server version 26.0.3 and earlier, update to version 26.0.4 or later. For Nextcloud Server version 27.0.0, update to version 27.0.1 or later.

**Name of the Vulnerable Software and Affected Versions** Nextcloud Server versions 22.0.0 through 22.2.10.12 Nextcloud Server versions 23.0.0 through 23.0.12.7 Nextcloud Server versions 24.0.0 through 24.0.12.4 Nextcloud Server versions 25.0.0 through 25.0.8 Nextcloud Server versions 26.0.0 through 26.0.3 **Description** The issue is related to missing protection in Nextcloud Server, allowing an attacker to brute force the client secrets of configured OAuth2 clients. This can be exploited by a remote attacker to enumerate secret data of configured OAuth2 clients due to improper rate limiting of authentication attempts. **Recommendations** For Nextcloud Server versions 22.0.0 through 22.2.10.12, update to version 22.2.10.13 or later. For Nextcloud Server versions 23.0.0 through 23.0.12.7, update to version 23.0.12.8 or later. For Nextcloud Server versions 24.0.0 through 24.0.12.4, update to version 24.0.12.5 or later. For Nextcloud Server versions 25.0.0 through 25.0.8, update to version 25.0.9 or later. For Nextcloud Server versions 26.0.0 through 26.0.3, update to version 26.0.4 or later.

**Name of the Vulnerable Software and Affected Versions** Nextcloud Desktop Client versions 3.0.0 through 3.6.x **Description** The Nextcloud Desktop Client synchronizes files from Nextcloud Server. A malicious server could exploit the client's trust in the server's certificate, leading to the encryption of files with a key known to the attacker. **Recommendations** For Nextcloud Desktop Client versions 3.0.0 through 3.6.x, update to version 3.7.0 to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** user oidc versions 1.0.0 through 1.3.0 **Description** A vulnerability in user oidc, the OIDC connect user backend for Nextcloud, an open source collaboration platform, allowed an attacker to bypass the state protection. This was possible because an attacker could copy the expected state token from the first request to their second request. **Recommendations** For versions 1.0.0 through 1.3.0, upgrade user oidc to version 1.3.0 to receive a patch for the issue.

**Name of the Vulnerable Software and Affected Versions** Nextcloud Server versions prior to 23.0.9 Nextcloud Enterprise Server versions prior to 24.0.5 **Description** The issue concerns exposure of information that cannot be controlled by administrators without direct database access. This affects Nextcloud Server and Nextcloud Enterprise Server. **Recommendations** For Nextcloud Server versions prior to 23.0.9, update to version 23.0.9 to resolve the issue. For Nextcloud Enterprise Server versions prior to 24.0.5, update to version 24.0.5 to resolve the issue.