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TI-2020-06653 Aliases CVE-2020-8235GHSA-crm5-43pc-vrcg

Authorization bypass in Nextcloud Deck app

Priority LOW 21CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-639.

Summary

Missing access control in Nextcloud Deck 1.0.4 caused an insecure direct object reference allowing an attacker to view all attachments.

Why it matters now

EPSS 0.00781 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—Nextcloud Deck appFixed in 1.0.5—No fix listedCNA
  • Nextcloud Deck app Vendor— Affected Fixed in 1.0.5 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:deck:1.0.4:*:*:*:*:*:*:*1.0.4Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:deck:1.0.4:*:*:*:*:*:*:* Versions 1.0.4 Vulnerable ·nextcloud

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-8235
  2. 2026-10-03 Alias added: GHSA-crm5-43pc-vrcg

References

Exploit 1

Advisory 1

  • TI-2023-08718 Nextcloud Deck card vulnerable to data leak to unauthorized users via reference preview cache CVSS 3.1MEDIUM 5.8
  • TI-2022-11703 Possibility for anyone to add a stack with existing tasks on anyone's board in Nextcloud Deck CVSS 3.1MEDIUM 5.0
  • TI-2022-08716 Error in deleting deck cards attachment reveals the full application path in Nextcloud Deck CVSS 3.1MEDIUM 4.3
  • TI-2021-16610 Missing permission check on Deck API CVSS 3.1HIGH 8.1
  • TI-2020-06600 Improper access control in Nextcloud Deck CVSS 3.1HIGH 8.0
  • TI-2021-05774 Information disclosure in Nextcloud Deck CVSS 3.1MEDIUM 6.5
See all 16 →

Sources

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