What is CVE-2020-8294?

CVE-2020-8294 is a medium-severity vulnerability in Nextcloud Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-03.

How severe is CVE-2020-8294?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Nextcloud Server

CVE-2020-8294

A missing link validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows execution of a stored XSS attack using Internet Explorer when saving a 'javascript:' URL in markdown format.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.009 (56.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nextcloud Nextcloud_server
N/a Nextcloud Server — versions Fixed in 20.0.2, 19.0.5, 18.0.11

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support@hackerone.com (Permissions Required, x_refsource_CONFIRM, Third Party Advisory)
support@hackerone.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2020-8294?: CVE-2020-8294 is a medium-severity vulnerability in Nextcloud Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-03.
How severe is CVE-2020-8294?: Medium severity. CVSS v3 base score is 5.4 out of 10.