Bug 1934837 (CVE-2021-22878)

Summary:	CVE-2021-22878 nextcloud: Reflected cross-site scripting due to lack of sanitization in `OC.Notification.show`
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ce, james.hogarth
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-03-04 01:02:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1934838
Bug Blocks:

Description Pedro Sampaio 2021-03-03 21:15:29 UTC

Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.

https://github.com/nextcloud/server/pull/25234
https://hackerone.com/reports/896522
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005

Comment 1 Pedro Sampaio 2021-03-03 21:15:50 UTC

Created nextcloud tracking bugs for this issue:

Affects: fedora-all [bug 1934838]

Comment 2 Product Security DevOps Team 2021-03-04 01:02:05 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.