KEV Entry

CVE-2023-49105

Known Exploited Vulnerability Entry CISA

Back to Catalog View Vulnerability
Entry Details
Confirmed Exploited

CVE-2023-49105

2026-08-27 00:00 UTC

Timestamps

2026-08-27

2026-08-27

Scope

ownCloud Improper Authentication Vulnerability | Affected: 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. | 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. | Due date: 2026-08-30 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): 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

References
  • {'id': 'CVE-2023-49105', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-49105'}

5070242f-3085-4b42-8b16-b457edc6ede5

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-08-27 18:00 UTC

2026-08-27 18:00 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-287"
  ],
  "date_added": "2026-08-27",
  "due_date": "2026-08-30",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "ownCloud",
  "vendorProject": "ownCloud",
  "vulnerabilityName": "ownCloud Improper Authentication Vulnerability"
}
 -
Export Options
JSON Object JSON API View Full Catalog