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https://issues.apache.org/jira/browse/OFBIZ-10187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841361#comment-16841361
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Jacques Le Roux commented on OFBIZ-10187:
-----------------------------------------

To be totally clear I compared the 2 versions. This is what I found:

You added
.allowAttributes("target").matching(NAME).onElements("a")
and the elements "header",  "picture", "source", "section", "nav", "footer"

On the other side there is more:
.allowAttributes("background").matching(ONSITE_URL)
.onElements("table")
.allowAttributes("background").matching(ONSITE_URL)
.onElements("td", "th", "tr")

Are the later missing on purpose?

I was also surprised how slight is 
https://github.com/OWASP/java-html-sanitizer/blob/master/src/main/java/org/owasp/html/examples/SlashdotPolicyExample.java

Anyway I'll try to use that as safe in a 1st step and will reserve eBay one as 
permissive as you did (ie will not change anything from your work).




> OWASP sanitizer breaks proper rendering of HTML code
> ----------------------------------------------------
>
>                 Key: OFBIZ-10187
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-10187
>             Project: OFBiz
>          Issue Type: Bug
>          Components: ALL COMPONENTS
>    Affects Versions: Trunk, 16.11.04, Release Branch 17.12, Release Branch 
> 18.12
>            Reporter: Michael Brohl
>            Assignee: Michael Brohl
>            Priority: Critical
>              Labels: backport-needed
>             Fix For: 17.12.01, 16.11.06, 18.12.01
>
>         Attachments: 
> OFBIZ-10187_Rewrite-CustomPermissivePolicy-matchesEithe.patch, 
> OFBIZ-10187_Sanitizer.patch, OFBIZ-10187_Sanitizer_16.11.patch, 
> OFBIZ-10187_Sanitizer_New.patch
>
>
> The current implementation of the sanitizer breaks the proper rendering of 
> html code. In our case, class attributes are stripped from the html content.
> Example:
> {code:java}
>             <div class="item">
>                  <img 
> src="<@ofbizContentUrl>/webcontent/img/slider/1.jpg</@ofbizContentUrl>" 
> alt="" />
>                  <div class="container">
>                      <div class="slider-overlay">
>                          <h2>Lorem ipsum dolor sit amet</h2>
>                          <h3>At vero eos et accusam et justo</h3>
>                          <p>
>                              Lorem ipsum dolor sit amet, consetetur 
> sadipscing elitr, dolores et ea rebum. Stet clita kasd gubergren, no sea
>                              takimata sanctus est Lorem ipsum dolor sit amet.
>                          </p>
>                          <a class="btn btn-grey" 
> href="<@ofbizUrl>cms/~webpage_id=100</@ofbizUrl>">weitere Informationen</a>
>                      </div>
>                  </div>
>              </div>{code}
> will be rendered to
> {code:java}
>             <div>
>                  <img 
> src="<@ofbizContentUrl>/webcontent/img/slider/1.jpg</@ofbizContentUrl>" 
> alt="" />
>                  <div>
>                      <div>
>                          <h2>Lorem ipsum dolor sit amet</h2>
>                          <h3>At vero eos et accusam et justo</h3>
>                          <p>
>                              Lorem ipsum dolor sit amet, consetetur 
> sadipscing elitr, dolores et ea rebum. Stet clita kasd gubergren, no sea
>                              takimata sanctus est Lorem ipsum dolor sit amet.
>                          </p>
>                          <a 
> href="<@ofbizUrl>cms/~webpage_id=100</@ofbizUrl>">weitere Informationen</a>
>                      </div>
>                  </div>
>              </div>{code}
> I do not see any reason to not allow class attributes in html code. There 
> might be other problems with these rules but this is a showstopper.



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