What is CVE-2020-8295?

CVE-2020-8295 is a high-severity vulnerability in Nextcloud Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-01-26.

How severe is CVE-2020-8295?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Nextcloud Server

CVE-2020-8295

A wrong check in Nextcloud Server 19 and prior allowed to perform a denial of service attack when resetting the password for a user.

Vulnerability class: DoS (Denial of Service)

Published 2021-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Nextcloud Server
Nextcloud Server — versions Fixed in 20.0.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

hackerone.com/reports/812754 (Exploit, Third Party Advisory)
nextcloud.com/security/advisory/ (Vendor Advisory)

Frequently asked questions

What is CVE-2020-8295?: CVE-2020-8295 is a high-severity vulnerability in Nextcloud Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-01-26.
How severe is CVE-2020-8295?: High severity. CVSS v3 base score is 7.5 out of 10.