Bug 1985315 (CVE-2021-35043) - CVE-2021-35043 AntiSamy: XSS via HTML attributes
Summary: CVE-2021-35043 AntiSamy: XSS via HTML attributes
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-35043
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1985316
TreeView+ depends on / blocked
 
Reported: 2021-07-23 11:18 UTC by Marian Rehak
Modified: 2021-07-26 20:39 UTC (History)
8 users (show)

Fixed In Version: antisamy 1.6.4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in AnitSamy, where it allows a Cross-site Scripting attack (XSS) via HTML attributes when using the HTML output serializer (XHTML is not affected). This issue was demonstrated by a javascript: URL with : as the replacement for the : character. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-07-26 10:46:49 UTC
Embargoed:

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Description Marian Rehak 2021-07-23 11:18:52 UTC 
OWASP AntiSamy before 1.6.4 allows XSS via HTML attributes when using the HTML output serializer (XHTML is not affected). This was demonstrated by a javascript: URL with &#00058 as the replacement for the : character.

Upstream Reference:

https://github.com/nahsra/antisamy/releases/tag/v1.6.4
https://github.com/nahsra/antisamy/pull/87
Comment 2 Jonathan Christison 2021-07-26 10:15:42 UTC 
Marking Red Hat JBoss Fuse 6 as having a low impact, this is because although antisamy is present in the offline repository it is not used.

This vulnerability is out of security support scope for the following products:

 * Red Hat JBoss Fuse 6

Please refer to https://access.redhat.com/support/policy/updates/jboss_notes for more details.
Comment 4 Product Security DevOps Team 2021-07-26 10:46:49 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-35043
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