Lars Krapf created SLING-7777:
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Summary: XSSFilter is rejecting URLs containing only queries or
fragments
Key: SLING-7777
URL: https://issues.apache.org/jira/browse/SLING-7777
Project: Sling
Issue Type: Bug
Components: XSS Protection API
Affects Versions: XSS Protection API 2.0.10
Reporter: Lars Krapf
Attachments: sling_xssfilter_patch.txt
The XSSFilter is erroneously rejecting URLs that consist only of queries,
(potentially empty) fragments or both, e.g. "#", "#test", "?foo=bar" etc.
Even though the RELATIVE_PART regexp contains an PATH_EMPTY group, it is
explicitly matching the *entire* string, so will fail if the QUERY or FRAGMENT
groups match.
A potential solution (see attached patch and tests) might be to remove the
PATH_EMPTY group from the RELATIVE_PART, and make the entire RELATIVE_PART
optional by adding ? to the group in RELATIVE_REF. This will still match
completely empty URLs.
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