Nextcloud Calendar 信息泄露漏洞

NextCloud Calendar is an open-source calendar application developed by NextCloud. There were information leakage vulnerabilities in versions 5.5.13 to 5.5.17 and 6.2.0 to 6.2.3 of NextCloud Calendar. These vulnerabilities stemmed from the lack of shared restrictions applied to the meeting...

The vulnerability of the Nextcloud calendar application, a cloud-based software for creating and using Nextcloud data storage, allows a perpetrator to gain unauthorized access to protected information.

The vulnerability of the Nextcloud calendar application, a cloud-based software for creating and using Nextcloud data storage, involves bypassing authentication by using a user-controlled key. Exploiting this vulnerability could allow an intruder to gain unauthorized access to protected informati...

The vulnerability of the Nextcloud Calendar application, a cloud-based software for creating and using Nextcloud data storage, relates to the use of insufficiently random values. This vulnerability allows attackers to compromise the confidentiality and integrity of the protected information.

The vulnerability of the Nextcloud Calendar application, a cloud-based software for creating and managing Nextcloud data storage, is related to the use of insufficiently random values. Exploiting this vulnerability could allow an attacker to compromise the confidentiality and integrity of the...

The vulnerability of the NextCloud Calendar application, a cloud-based software for creating and using NextCloud data storage, stems from improper handling of unexpected data types. This vulnerability allows attackers to compromise the integrity of the protected information.

The vulnerability of the Nextcloud Calendar application, a cloud-based software for creating and managing Nextcloud data storage, is related to improper handling of unexpected data types. Exploiting this vulnerability could allow an attacker to compromise the integrity of the protected informatio...

ROS-20260209-73-0022

Vulnerability in nextcloud-app-calendar related to authorization bypass through the use of a user-controlled key. Exploitation of the vulnerability may allow a remote attacker to gain unauthorized access to protected information...

ROS-20260129-73-0048

Vulnerability in nextcloud-app-calendar related to improper handling of an unexpected data type. Exploitation of the vulnerability could allow an attacker to cause a denial of service...

ROS-20260129-73-0049

Vulnerability in nextcloud-app-calendar related to the use of insufficiently randomized values. Exploitation of the vulnerability may allow a remote attacker to gain unauthorized access to protected information...

CVE-2023-45150

Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended th...

Nextcloud Calendar Security Feature Issue Vulnerability

Nextcloud Calendar is a Nextcloud open source calendar application. Nextcloud Calendar suffers from a security signature issue vulnerability that stems from an insecure way of generating meeting proposal participant tokens, which can be exploited by an attacker to cause the tokens to be computed...

CVE-2025-66550

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...

CVE-2025-66511

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for meeting proposals using a hash function, allowing an attacker to compute valid participant tokens, which allowed them to request details and submit dates in meeting proposals. The...

CVE-2025-66546

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1...

CVE-2025-66546

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1...

CVE-2025-66550

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...

CVE-2025-66511

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for meeting proposals using a hash function, allowing an attacker to compute valid participant tokens, which allowed them to request details and submit dates in meeting proposals. The...

CVE-2025-66550

CVE-2025-66550 affects Nextcloud Calendar prior to versions 4.7.17 and 5.2.4. A malicious user could create a calendar event with an attachment that links to a download URL for a file on the same Nextcloud server, causing the file to be downloaded without user confirmation. The issue is resolved ...

EUVD-2025-201443

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...

CVE-2025-66550 Nextcloud Calendar attachments of local files are offered to downloaded

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...

CVE-2025-66550 Nextcloud Calendar attachments of local files are offered to downloaded

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...

CVE-2025-66550 Nextcloud Calendar attachments of local files are offered to downloaded

Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This...