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

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MEDIUM

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

Published Feb 3, 2021

5.4

MEDIUM

CVSS 3.1

EPSS 0.90%

Description

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.

Affected products

Vendor n/a Product Nextcloud Server Default
n/a
- Version
  Fixed in 20.0.2, 19.0.5, 18.0.11
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

Nextcloud Server

n/a

Version	Status	Constraints
Fixed in 20.0.2, 19.0.5, 18.0.11	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://hackerone.com/reports/1023787
x_refsource_CONFIRMPermissions RequiredThird Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
https://hackerone.com/reports/1023787		x_refsource_CONFIRMPermissions RequiredThird Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002		x_refsource_CONFIRMVendor Advisory