CVE-2023-49105CISA KEVEPSS p98.7%

CVE-2023-49105ownCloud Improper Authentication Vulnerability

ownCloud / ownCloud

Description

ownCloud contains an improper authentication vulnerability that allows an attacker to access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured.

Scoring

CVSS 9.8 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS42.92% probability of exploitation · percentile 98.7% · 2026-10-03T12:00:21Z
Last modified2026-08-28

CISA KEV entry

Added to KEV: 2026-08-27

Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.