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CVE-2003-0791

30
FAUCET Score

CVE-2003-0791 describes a critical deserialization vulnerability in Mozilla 1.4 and earlier, affecting products such as Mozilla, Mozilla OpenServer, SCO Mozilla, and SCO OpenServer. Attackers can exploit the Script.prototype.freeze/thaw functionality by manipulating the input string to the script.thaw JavaScript function, leading to the execution of arbitrary native methods. This vulnerability carries a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and it is not listed in the KEV catalog, the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness and potential interest.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.4CPE matchmatch criteria
cpe:2.3:a:mozilla:mozilla:*:*:*:*:*:*:*:*
5.0.7CPE matchmatch criteria
cpe:2.3:o:sco:openserver:5.0.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 69th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mozillapatch availablevia nvd_reference
View patch

References

bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPatchVendor Advisory
secunia.com / advisories/11103
URL Repurposed
mandriva.com / security/advisories
Broken Link
osvdb.org / 8390
Broken LinkPatchVendor Advisory
securityfocus.com / advisories/6979
Broken LinkPatchThird Party AdvisoryVDB EntryVendor Advisory
securityfocus.com / bid/9322
Broken LinkPatchThird Party AdvisoryVDB EntryVendor Advisory