HOME VULNERABILITIESCVE-2003-0791

CRITICAL

CVE-2003-0791

CWE-502Published: October 7, 2003· Updated: Jun 16, 2026

9.8

CVSS v3.1

Official Description

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.

Technical Analysis

CVE-2003-0791 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Mozilla1 product(s)

mozilla

sco1 product(s)

openserver

Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.osvdb.org/8390

PATCHhttp://www.securityfocus.com/advisories/6979

PATCHhttp://www.securityfocus.com/bid/9322

PATCHhttps://bugzilla.mozilla.org/show_bug.cgi?id=221526

PATCHhttp://www.osvdb.org/8390

PATCHhttp://www.securityfocus.com/advisories/6979

PATCHhttp://www.securityfocus.com/bid/9322

PATCHhttps://bugzilla.mozilla.org/show_bug.cgi?id=221526

All References (12)

→

http://secunia.com/advisories/11103/URL Repurposed

→

http://www.mandriva.com/security/advisories?name=MDKSA-2004:021Broken Link

→

http://www.osvdb.org/8390Broken Link · Patch · Vendor Advisory

→

http://www.securityfocus.com/advisories/6979Broken Link · Patch · Third Party Advisory · VDB Entry · Vendor Advisory

→

http://www.securityfocus.com/bid/9322Broken Link · Patch · Third Party Advisory · VDB Entry · Vendor Advisory

→

https://bugzilla.mozilla.org/show_bug.cgi?id=221526Issue Tracking · Patch · Vendor Advisory

→

http://secunia.com/advisories/11103/URL Repurposed

→

http://www.mandriva.com/security/advisories?name=MDKSA-2004:021Broken Link

→

http://www.osvdb.org/8390Broken Link · Patch · Vendor Advisory

→

http://www.securityfocus.com/advisories/6979Broken Link · Patch · Third Party Advisory · VDB Entry · Vendor Advisory

→

http://www.securityfocus.com/bid/9322Broken Link · Patch · Third Party Advisory · VDB Entry · Vendor Advisory

→

https://bugzilla.mozilla.org/show_bug.cgi?id=221526Issue Tracking · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2003-0791

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-502

CISA KEVNo

Affected2 vendor(s)

PublishedOct 7, 2003

Related CVEs (CWE-502)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2003-0791 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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