What’s Vulnerable › Vulnerabilities

CVE-2020-8297

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-23 · updated 2026-06-17
• Weakness: CWE-639

Description

Nextcloud Deck before 1.0.2 suffers from an insecure direct object reference (IDOR) vulnerability that permits users with a duplicate user identifier to access deck data of a previous deleted user.

Affected products

• Nextcloud Deck: before 1.0.2 — fixed in 1.0.2

How to fix

Upgrade to a fixed version: Nextcloud Deck 1.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/deck/pull/1976
• https://hackerone.com/reports/882258
• https://nextcloud.com/security/advisory/?id=NC-SA-2021-007
• https://github.com/nextcloud/deck/pull/1976
• https://hackerone.com/reports/882258
• https://nextcloud.com/security/advisory/?id=NC-SA-2021-007

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