Occurred Aug 27, 2026, 12:00:00 AM UTC

First published Oct 27, 2026, 8:10:16 PM UTC · Last updated Oct 27, 2026, 8:10:16 PM UTC

CVE-2023-49105: ownCloud Improper Authentication Vulnerability

Reported by CISA Known Exploited Vulnerabilities

The vulnerability may allow an attacker to access, modify, or delete any file without authentication if the victim’s username is known and no signing key is configured. The source calls for mitigations under vendor instructions and applicable CISA guidance; additional details were not included in the source data received by Planet Briefing.

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Why it matters

The source describes a vulnerability that can permit unauthorized file access and changes under the stated conditions.

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 7/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 2/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 3/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 6/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

CISA Known Exploited Vulnerabilities CVE-2023-49105: ownCloud Improper Authentication Vulnerability

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