What is CVE-2020-8182?

CVE-2020-8182 is a high-severity vulnerability in Nextcloud Deck, classified under Improper Access Control. CVSS score: 8.0/10. Published 2020-10-05.

How severe is CVE-2020-8182?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Nextcloud Deck

CVE-2020-8182

Improper access control in Nextcloud Deck 0.8.0 allowed an attacker to reshare boards shared with them with more permissions than they had themselves.

Published 2020-10-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Nextcloud Deck — versions 0.8.0
Nextcloud Deck — versions Fixed in 0.8.1

Weakness classification (CWE)

References

hackerone.com/reports/827816 (Exploit, Third Party Advisory)
nextcloud.com/security/advisory/ (Vendor Advisory)

Frequently asked questions

What is CVE-2020-8182?: CVE-2020-8182 is a high-severity vulnerability in Nextcloud Deck, classified under Improper Access Control. CVSS score: 8.0/10. Published 2020-10-05.
How severe is CVE-2020-8182?: High severity. CVSS v3 base score is 8.0 out of 10.