CVE-2023-39959CWE-284

Existence of calendars and address books can be checked by unauthenticated users

Low · published August 10, 2023

CVSS v3.1
3.5
EPSS
1%
Percentile
48.4
In the wild
Unconfirmed
What it is

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.9, 26.0.4, and 27.0.1, unauthenticated users could send a DAV request which reveals whether a calendar or an address book with the given identifier exists for the victim. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00608 · 48.4th percentile
Weakness
CWE-284 · Improper Access Control
Published
2023-08-10T17:07Z
EPSS history
Timeline
  • 10 AUG 17:07Z
    Existence of calendars and address books can be checked by unauthenticated users
    cvelistv5