CVE-2023-48239

Summary

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Server and starting in version 20.0.0 and prior to versions 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 of Nextcloud Enterprise Server, a malicious user could update any personal or global external storage, making them inaccessible for everyone else as well. Nextcloud Server 25.0.13, 26.0.8, and 27.1.3 and Nextcloud Enterprise Server is upgraded to 20.0.14.16, 21.0.9.13, 22.2.10.15, 23.0.12.12, 24.0.12.8, 25.0.13, 26.0.8, and 27.1.3 contain a patch for this issue. As a workaround, disable app files_external. This workaround also makes the external storage inaccessible but retains the configurations until a patched version has been deployed.

Affected Software

VendorProductVersion RangeStatus
nextcloudsecurity-advisories>= 25.0.0, < 25.0.13affected
nextcloudsecurity-advisories>= 26.0.0, < 26.0.8affected
nextcloudsecurity-advisories>= 27.0.0, < 27.1.3affected
nextcloudsecurity-advisories>= 20.0.0, < 20.0.14.16affected
nextcloudsecurity-advisories>= 21.0.0, < 21.0.9.13affected
nextcloudsecurity-advisories>= 22.0.0, < 22.2.10.15affected
nextcloudsecurity-advisories>= 23.0.0, < 23.0.12.12affected
nextcloudsecurity-advisories>= 24.0.0, < 24.0.12.8affected

Weaknesses

  • CWE-284: CWE-284: Improper Access Control

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References