## [悪用確認] CVE-2023-49105: ownCloud Improper Authentication Vulnerability

- 種別: advisory
- 重大度: critical
- CVE: CVE-2023-49105
- 公開日時: 2026-08-27T00:00:00.000Z
- 情報源: CISA Known Exploited Vulnerabilities (https://nvd.nist.gov/vuln/detail/CVE-2023-49105)
- パーマリンク: https://vulnpulse.app/items/cisa-kev-cve-2023-49105

ownCloud ownCloud
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.
対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. (期限 2026-08-30)