Exploited vulnerability CISA KEV
CVE-2023-49105: ownCloud Improper Authentication Vulnerability
CVE-2023-49105 is a vulnerability in ownCloud ownCloud that CISA added to its Known Exploited Vulnerabilities catalog on August 27, 2026, meaning there is evidence it is being exploited. US federal civilian agencies must complete the required action by August 30, 2026.
CVE-2023-49105 is a vulnerability in ownCloud ownCloud that CISA added to its Known Exploited Vulnerabilities catalog on August 27, 2026, meaning there is evidence it is being exploited. US federal civilian agencies must complete the required action by August 30, 2026.
- CVE ID
- CVE-2023-49105
- Vendor / project
- ownCloud
- Product
- ownCloud
- Added to KEV
- Due date
- Days to remediate
- 3
- Known ransomware use
- Unknown
- Weakness
- CWE-287
CISA 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.
Required action #
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.
Notes and references #
https://owncloud.org/security ; https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2023-49105
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