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TI-2023-17618 Aliases CVE-2023-35173

End-to-End encrypted file-drops can be made inaccessible

Priority LOW 29CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously dropped files inaccessible. It is recommended that the Nextcloud End-to-end encryption app is upgraded to version 1.12.4 that contains the fix.

Why it matters now

EPSS 0.00493 42nd percentileScored 2026-11-07
Fix Fixed security-advisories (nextcloud): 1.12.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisories1.12.0 to before 1.12.41.12.4Patch availableCNA
  • security-advisories Vendornextcloud Affected 1.12.0 to before 1.12.4 Fixed in 1.12.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:*1.12.0 to before 1.12.4Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:* Versions 1.12.0 to before 1.12.4 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 1.12.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-35173

References

Patch 1

Advisory 2

  • TI-2021-05767 Uncontrolled resource consumption in Nextcloud End-to-End Encryption CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences