CVE-2024-26143: Rails Possible XSS Vulnerability in Action Controller

Possible XSS Vulnerability in Action Controller

There is a possible XSS vulnerability when using the translation helpers (translate, t, etc) in Action Controller. This vulnerability has been assigned the CVE identifier CVE-2024-26143.

Versions Affected: >= 7.0.0. Not affected: < 7.0.0 Fixed Versions: 7.1.3.1, 7.0.8.1

Impact ------ Applications using translation methods like translate, or t on a controller, with a key ending in "html", a :default key which contains untrusted user input, and the resulting string is used in a view, may be susceptible to an XSS vulnerability.

For example, impacted code will look something like this:

ruby class ArticlesController < ApplicationController def show @message = t("messagehtml", default: untrustedinput) # The show template displays the contents of @message end end

To reiterate the pre-conditions, applications must:

Use a translation function from a controller (i.e. not I18n.t, or t from a view) Use a key that ends in html Use a default value where the default value is untrusted and unescaped input Send the text to the victim (whether that's part of a template, or a render call)

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.

7-0-translate-xss.patch - Patch for 7.0 series 7-1-translate-xss.patch - Patch for 7.1 series

Credits -------

Thanks to oooooooq for the patch and fix!