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Case File

CVE-2021-23435

HIGH · CVSS 7.6 EPSS 0.70% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-12 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.6. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-23435
Severity
HIGH
CVSS
7.6
EPSS
0.70%

Original NVD 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).

Related CVEs

Other vulnerabilities affecting the same vendor(s)