HIGH CISA-KEV ACTIVELY EXPLOITED PoC

CVE-2023-49105

ownCloud Improper Authentication Vulnerability

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.

Affected Products

References

Published: 2026-08-27 · Source: CISA-KEV · Feed updated: 2026-08-27
This high severity vulnerability was published on 2026-08-27 via CISA-KEV. ⚠ This vulnerability is in the CISA Known Exploited Vulnerabilities (KEV) catalog — it is being actively exploited in the wild. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 11.1% (top 4% of all CVEs by exploitation probability). Affected: ownCloud: ownCloud.

Risk Timeline

CVE Disclosed2026-08-27 · 0 days ago
Public PoC Exploit AvailableWeaponised proof-of-concept code is publicly accessible
CISA KEV — Actively ExploitedU.S. federal agencies required to patch · confirmed threat-actor activity

Remediation Resources

CISA / KEV
www.cisa.gov/known-exploited-vulnerabilities-catalog
NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2023-49105
vulnfeed aggregates 11337 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.