CVE-2021-23435

Open Redirect

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).

Category

7.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.28%
Third-Party Advisory github.com Third-Party Advisory snyk.io
Affected: n/a clearance
Published at:
Updated at:

References

Link Tags
https://snyk.io/vuln/SNYK-RUBY-CLEARANCE-1577284 third party advisory
https://github.com/thoughtbot/clearance/pull/945 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-23435?
CVE-2021-23435 has been scored as a high severity vulnerability.
How to fix CVE-2021-23435?
To fix CVE-2021-23435, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23435 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-23435 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23435?
CVE-2021-23435 affects n/a clearance.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.