CVE-2024-37887: Nextcloud Server's events information leaked with shared calendars on recurrence exceptions

Description

Nextcloud Server is a self hosted personal cloud system. Private shared calendar events' recurrence exceptions can be read by sharees. It is recommended that the Nextcloud Server is upgraded to 27.1.10 or 28.0.6 or 29.0.1 and that the Nextcloud Enterprise Server is upgraded to 27.1.10 or 28.0.6 or 29.0.1.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

Required

Confidentiality

Low

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 32% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

SE

security-advisories · nextcloud

>= 27.0.0, < 27.1.10; >= 27.0.0, < 28.0.6; >= 27.0.0, < 29.0.1 · source: vendor

NS

Nextcloud Server · Nextcloud

27.0.0 before 27.1.10; 27.0.0 before 27.1.10; 28.0.0 through 28.0.6; 28.0.0 before 28.0.6; 29.0.0; 29.0.0 · source: NVD