Data-Tags and the New HTML Sanitizer Subverts CSRF protection

Summary

Possible XSS vulnerability in rails-html-sanitizer

There is a possible XSS vulnerability in rails-html-sanitizer. This vulnerability has been assigned the CVE identifier CVE-2015-7578.

Versions Affected: All. Not affected: None. Fixed Versions: 1.0.3

Impact

There is a possible XSS vulnerability in rails-html-sanitizer. Certain attributes are not removed from tags when they are sanitized, and these attributes can lead to an XSS attack on target applications.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Releases

The FIXED releases are available at the normal locations.

Workarounds

There are no feasible workarounds for this issue.

Patches

To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.

• 1-0-sanitize_data_attributes.patch - Patch for 1.0 series

Credits

Thanks to Ben Murphy and Marien for reporting this