Staging Environment: Content and features may be unstable or change without notice.
Advisory details: ruby_advisory_db / gems/actionview/CVE-2020-15169
Advisory ID ruby_advisory_db/gems/actionview/CVE-2020-15169
Aliases CVE-2020-15169
GHSA-cfjv-5498-mph5
Summary Potential XSS vulnerability in Action View There is a potential Cross-Site Scripting (XSS) vulnerability in Action View's translation helpers. Views that allow the user to control the default (not found) value of the `t` and `translate` helpers could be susceptible to XSS attacks. Impact ------ When an HTML-unsafe string is passed as the default for a missing translation key [named `html` or ending in `_html`](https://guides.rubyonrails.org/i18n.html#using-safe-html-translations), the default string is incorrectly marked as HTML-safe and not escaped. Vulnerable code may look like the following examples: ```erb <%# The welcome_html translation is not defined for the current locale: %> <%= t("welcome_html", default: untrusted_user_controlled_string) %> <%# Neither the title.html translation nor the missing.html translation is defined for the current locale: %> <%= t("title.html", default: [:"missing.html", untrusted_user_controlled_string]) %> ``` Workarounds ----------- Impacted users who can’t upgrade to a patched Rails version can avoid this issue by manually escaping default translations with the `html_escape` helper (aliased as `h`): ```erb <%= t("welcome_html", default: h(untrusted_user_controlled_string)) %> ```
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3 5.4
Reference id Reference type URL
https://groups.google.com/g/rubyonrails-security/c/b-C9kSGXYrc

No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.

There are no known vectors.

There are no SSVC decisions available.