MediaWiki

From Nick Jenkins
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Various MediaWiki 1.6.1 parser tests, that fail HTML validation:


Test Wiki Source Validate HTML Tidy HTML Security
aspects?1
Visible
Artefacts?
Notes and any extra info.
MediaWiki/Parser1 Export Wiki Source W3C Validator Tidy HTML No Yes Stikes out almost all text. Explanation for this + Parser1-hidden + Parser2 + Parser3 + Parser4 + Parser5.
MediaWiki/Parser1-hidden Export Wiki Source W3C Validator Tidy HTML No Yes Hides almost all text, which also makes all page links unavailable.
MediaWiki/Parser2 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser3 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser4 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser5 Export Wiki Source W3C Validator Tidy HTML No Yes Shrinks font, moves the top page action links up about 5 pixels and left about 10 pixels.
MediaWiki/Parser6 Export Wiki Source W3C Validator Tidy HTML No Yes Shrinks font, moves the left navigation bar down about 160 pixels, strikes out almost all text.
MediaWiki/Parser7 Export Wiki Source W3C Validator Tidy HTML No No. Completely fixed in 1.6.1 - valid HTML, no artefacts, no tidy errors.
MediaWiki/Parser8 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser9 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser10 Export Wiki Source W3C Validator Tidy HTML No No
MediaWiki/Parser11 Export Wiki Source W3C Validator Tidy HTML Yes No. No. Explanation. Security aspects now fixed in 1.6, although still fails W3C Validation.
MediaWiki/Parser12 Export Wiki Source W3C Validator Tidy HTML Yes No. No. Explanation. Security aspects now fixed in 1.6, although still fails W3C Validation.
MediaWiki/Parser13 Export Wiki Source W3C Validator Tidy HTML Yes. No. Drops the '<a href="xxx' string. Explanation for this + Parser14 + Parser14-table.
MediaWiki/Parser14 Export Wiki Source W3C Validator Tidy HTML Yes. No.
MediaWiki/Parser14-table Export Wiki Source W3C Validator Tidy HTML Yes. No.
MediaWiki/Parser15 Export Wiki Source W3C Validator Tidy HTML No No. Generates Tidy error due to <caption> tags out of order. As of 1.6 just fails validation.
MediaWiki/Parser16 Export Wiki Source W3C Validator Tidy HTML Yes. No. Generates Tidy error due to <th> tags out of order. As of 1.6, now drops the '<a href="xxx' string.
MediaWiki/Parser17 Export Wiki Source W3C Validator Tidy HTML Yes. No. No. Completely fixed in 1.6.1 - valid HTML, no artefacts, no tidy errors.
MediaWiki/Parser18 Export Wiki Source W3C Validator Tidy HTML Yes. No. No. Completely fixed in 1.6.1 - valid HTML, no artefacts, no tidy errors.
MediaWiki/Parser19 Export Wiki Source W3C Validator Tidy HTML Yes. No. No. Completely fixed in 1.6.1 - valid HTML, no artefacts, no tidy errors.


1: For the above table, "security aspect" is defined as anything that causes the start of a tag to be missing, or the end to be missing, or attributes of any type that should not be there to be injected. For example:

  • <p><td><s></p> would not be considered to have a security aspect because all the tags are appearing ok (are not malformed), although it is invalid HTML.
  • <a href="http://as<td></td><td class="external free"><p>user text here would be considered to have a security aspect because the "href" string is not properly terminated, and so the "external free" part is injected as attributes.
  • A string missing the start of a tag would also be considered to have a security aspect - e.g. <th>|||||" class="external free" title="https://%7C%7C%7C%7C%7C%7C" rel="nofollow">https://</th> - because the <a href="xxx part has been cut off.

So to sum up: if tags are just in the wrong order, but are otherwise complete and well-formed, then it is not a security issue; otherwise it is considered to potentially be, and is listed as "Yes" in the above table.