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bdu:2021-01348

cnvd-2020-18545

EUVD-2026-36473

fkie_cve-2020-5267

In ActionView before versions 6.0.2.2 and 5.2.4.2, there is a possible XSS vulnerability in ActionView's JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS attacks. The issue is fixed in versions 6.0.2.2 and 5.2.4.2.

GHSA-65cv-r6x7-79hv — Cross site scripting vulnerability in ActionView

Affected: RubyGems: actionview

There is a possible cross site scripting (XSS) vulnerability in ActionView's JavaScript literal escape helpers. Views that use the `j` or `escape_javascript` methods may be susceptible to XSS attacks.

### Impact

There is a possible XSS vulnerability in the `j` and `escape_javascript` methods in ActionView. These methods are used for escaping JavaScript string literals. Impacted code will look something like this:

```erb <script>let a = `<%= j unknown_input %>`</script> ```

```erb <script>let a = `<%= escape_javascript unknown_input %>`</script> ```

### Releases

The 6.0.2.2 and 5.2.4.2 releases are available at the normal locations.

### Workarounds

For those that can't upgrade, the following monkey patch may be used:

```ruby ActionView::Helpers::JavaScriptHelper::JS_ESCAPE_MAP.merge!( { "`" => "\\`", "$" => "\\$" } )

module ActionView::Helpers::JavaScriptHelper alias :old_ej :escape_javascript alias :old_j :j

def escape_javascript(javascript) javascript = javascript.to_s if javascript.empty? result = "" else result = javascript.gsub(/(\\|<\/|\r\n|\342\200\250|\342\200\251|[\n\r"']|[`]|[$])/u, JS_ESCAPE_MAP) end javascript.html_safe? ? result.html_safe : result end

alias :j :escape_javascript end ```

### 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.

* [5-2-js-helper-…

gsd-2020-5267

openSUSE-SU-2020:0627-1 — Security update for rubygem-actionview-5_1

Security update for rubygem-actionview-5_1

RHSA-2020:4366 — Red Hat Security Advisory: Satellite 6.8 release

mysql-connector-java: Connector/J unspecified vulnerability (CPU October 2018) puppet-agent: Puppet Agent does not properly verify SSL connection when downloading a CRL rack-protection: Timing attack in authenticity_token.rb hibernate-validator: safeHTML validator allows XSS Django: Incorrect HTTP detection with reverse-proxy connecting via HTTPS rubygem-rack: hijack sessions by using timing attacks targeting the session id rubygem-secure_headers: limited header injection when using dynamic overrides with user input rubygem-secure_headers: directive injection when using dynamic overrides with user input rubygem-actionview: views that use the `j` or `escape_javascript` methods are susceptible to XSS attacks netty: HTTP Request Smuggling due to Transfer-Encoding whitespace mishandling rubygem-websocket-extensions: ReDoS vulnerability in Sec-WebSocket-Extensions parser puppet: Arbitrary catalog retrieval puppet: puppet server and puppetDB may leak sensitive information via metrics API rubygem-rack: directory traversal in Rack::Directory rubygem-rack: percent-encoded cookies can be used to overwrite existing prefixed cookie names jackson-databind: Lacks certain xbean-reflect/JNDI blocking jackson-databind: Serialization gadgets in shaded-hikari-config jackson-databind: Serialization gadgets in ibatis-sqlmap jackson-databind: Serialization gadgets in anteros-core hibernate-validator: Improper input validation in the interpolation of constraint error messages jackson-databind: Ser…

SUSE-SU-2020:0954-1 — Security update for rubygem-actionview-4_2

Security update for rubygem-actionview-4_2

UBUNTU-CVE-2020-5267

Affected: Ubuntu:Pro:16.04:LTS: rails, Ubuntu:Pro:18.04:LTS: rails, Ubuntu:Pro:20.04:LTS: rails