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CVE-2003-0791

Critical Vulnerability: CVE-2003-0791 — mozilla, sco — mozilla, openserver

The Script.prototype.freeze/thaw functionality in Mozilla 1.4 and earlier allows attackers to execute native methods by modifying the string used as input to the script.thaw JavaScript function, which is then deserialized and executed.

Sunday, April 19, 2026mozilla, scoVulnios Threat Intelligence
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Executive Summary

The Script.prototype.freeze/thaw functionality in Mozilla 1.4 and earlier allows attackers to execute native methods by modifying the string used as input to the script.thaw JavaScript function, which is then deserialized and executed.

Why It Matters

CVE-2003-0791 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

Affected Technologies

Vendors: mozilla, sco

Products: mozilla, openserver

🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2003-0791.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

    • Use Vulnios to continuously monitor your exposure to CVE-2003-0791 and similar vulnerabilities.

    References & Sources

  • http://secunia.com/advisories/11103/
  • http://www.mandriva.com/security/advisories?name=MDKSA-2004:021
  • http://www.osvdb.org/8390
  • http://www.securityfocus.com/advisories/6979
  • http://www.securityfocus.com/bid/9322
  • https://bugzilla.mozilla.org/show_bug.cgi?id=221526
  • http://secunia.com/advisories/11103/
  • http://www.mandriva.com/security/advisories?name=MDKSA-2004:021
  • http://www.osvdb.org/8390
  • http://www.securityfocus.com/advisories/6979

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    Affected Products

    mozillaopenserver

    Sources

    critical

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