What’s Vulnerable › Vulnerabilities

CVE-2023-22471: Nextcloud Deck vulnerable to authorization bypass

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-14 · updated 2026-06-17
• Weakness: CWE-639

Description

Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Broken access control allows a user to delete attachments of other users. There are currently no known workarounds. It is recommended that the Nextcloud Deck app is upgraded to 1.6.5 or 1.7.3 or 1.8.2.

Affected products

• Nextcloud Deck: before 1.6.5; from 1.7.0 before 1.7.3; from 1.8.0 before 1.8.2 — fixed in 1.6.5, 1.7.3, 1.8.2

How to fix

Upgrade to a fixed version: Nextcloud Deck 1.6.5, 1.7.3, 1.8.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/deck/pull/4173
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vw5-pfg6-3wm6
• https://github.com/nextcloud/deck/pull/4173
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vw5-pfg6-3wm6

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