CVE-2023-49104
A remote, anonymous attacker can exploit multiple vulnerabilities in ownCloud to disclose information, bypass security measures, and manipulate files.
CSIRTS triage
- What
- Multiple vulnerabilities in ownCloud allow remote anonymous attackers to disclose information, bypass security measures, and manipulate files.
- Who is affected
- All ownCloud deployments are affected; exploitation is already active.
- Urgency
- Critical; actively exploited vulnerabilities with remote unauthenticated attack vector.
- Action
- Apply the latest ownCloud security patches immediately and verify file integrity.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploited[UPDATE] [critical] ownCloud: Multiple vulnerabilitiescert-bund · 2026-08-28
External references
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[](https://www.csirts.com/cve/CVE-2023-49104)