Vulnerability · Published Sep 12, 2021 · Assigned by snyk
CVE-2021-23435Open Redirect
High 7.6
In plain English
A high-severity security flaw in clearance. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.6High
Exploit odds (30 days)0.7%top 46.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
This affects the package clearance before 2.5.0. The vulnerability can be possible when users are able to set the value of session[:return_to]. If the value used for return_to contains multiple leading slashes (/////example.com) the user ends up being redirected to the external domain that comes after the slashes (http://example.com).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| RubyGems | clearance | 2.5.0 | GHSA-4hpq-rjcx-7vj9 |
Affected products (as reported)
References
- https://snyk.io/vuln/SNYK-RUBY-CLEARANCE-1577284 x_refsource_MISC
- https://github.com/thoughtbot/clearance/pull/945 x_refsource_MISC