Bug 1909832 (CVE-2020-26280)

Summary:	CVE-2020-26280 openslides: XSS in all user-editable HTML fields
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	adam, bgilbert
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:	2020-12-21 19:31:15 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:	1909833, 1909834, 1909835, 1909837
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-12-21 18:55:39 UTC

OpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda, motions, and elections of assemblies. OpenSlides version 3.2, due to unsufficient user input validation and escaping, it is vulnerable to persistant cross-site scripting (XSS). In the web applications users can enter rich text in various places, e.g. for personal notes or in motions. These fields can be used to store arbitrary JavaScript Code that will be executed when other users read the respective text. An attacker could utilize this vulnerability be used to manipulate votes of other users, hijack the moderators session or simply disturb the meeting. The vulnerability was introduced with 6eae497abeab234418dfbd9d299e831eff86ed45 on 16.04.2020, which is first included in the 3.2 release. It has been patched in version 3.3 ( in commit f3809fc8a97ee305d721662a75f788f9e9d21938, merged in master on 20.11.2020).

Reference:
https://github.com/OpenSlides/OpenSlides/security/advisories/GHSA-w5wr-98qm-jx92

Upstream patch:
https://github.com/OpenSlides/OpenSlides/pull/5714

Comment 1 Guilherme de Almeida Suckevicz 2020-12-21 18:56:03 UTC

Created python-openslide tracking bugs for this issue:

Affects: epel-all [bug 1909834]
Affects: fedora-all [bug 1909833]

Comment 2 Guilherme de Almeida Suckevicz 2020-12-21 18:57:22 UTC

Created openslide tracking bugs for this issue:

Affects: epel-all [bug 1909837]
Affects: fedora-all [bug 1909835]

Comment 3 Product Security DevOps Team 2020-12-21 19:31:15 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.

Comment 4 Benjamin Gilbert 2020-12-21 21:11:19 UTC

OpenSlide and OpenSlides are different projects.  The CVE affects OpenSlides, which is retired in Fedora and was never packaged for EPEL:

    https://src.fedoraproject.org/rpms/openslides