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CVE-2008-2803

19
FAUCET Score

CVE-2008-2803 describes a vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey where the mozIJSSubScriptLoader.LoadScript function fails to apply security wrappers to scripts loaded from specific URI types (file:, data:, and certain chrome: URIs). This oversight allows remote attackers to execute arbitrary code, particularly through third-party add-ons. The vulnerability carries a CVSS score of 6.8, indicating a medium severity risk with network access, medium attack complexity, and potential for partial impact on confidentiality, integrity, and availability. Despite its age, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.0.0.14CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:2.0:*:*:*:*:*:*:*
2.0.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:2.0.0.1:*:*:*:*:*:*:*
2.0.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:2.0.0.2:*:*:*:*:*:*:*
2.0.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:2.0.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.21%
Probability of exploitation in next 30 days
EPSS Percentile
86.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0321 is in the 81st percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (10)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 2.1Fixed in: seamonkey-0:1.0.9-0.17.el2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.9-0.20.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-16.3.el4_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:1.5.0.12-0.19.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-14.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: devhelp-0:0.12-17.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0-2.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9-1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: yelp-0:2.16.0-19.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.16-1.el5
View patch

Vendor Advisories (1)

redhatCVE-2008-2803Critical

Firefox javascript arbitrary code execution

Jul 2, 2008

References

lists.opensuse.org / opensuse-security-announce/2008-07/msg00004.html
rhn.redhat.com / errata/RHSA-2008-0616.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/30878
secunia.com / advisories/30898
secunia.com / advisories/30903
secunia.com / advisories/30911
Vendor Advisory
secunia.com / advisories/30915
secunia.com / advisories/30949
secunia.com / advisories/31005
secunia.com / advisories/31008
secunia.com / advisories/31021
secunia.com / advisories/31023
secunia.com / advisories/31069
secunia.com / advisories/31076
secunia.com / advisories/31183
secunia.com / advisories/31195
secunia.com / advisories/31220
secunia.com / advisories/31253
secunia.com / advisories/31286
secunia.com / advisories/31377
secunia.com / advisories/31403
secunia.com / advisories/33433
secunia.com / advisories/34501
security.gentoo.org / glsa/glsa-200808-03.xml
issues.rpath.com / browse/RPL-2646
slackware.com / security/viewer.php
slackware.com / security/viewer.php
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10747
sunsolve.sun.com / search/document.do
redhat.com / archives/fedora-package-announce/2008-August/msg00125.html
redhat.com / archives/fedora-package-announce/2008-August/msg00144.html
redhat.com / archives/fedora-package-announce/2008-July/msg00207.html
redhat.com / archives/fedora-package-announce/2008-July/msg00288.html
redhat.com / archives/fedora-package-announce/2008-July/msg00295.html
wiki.rpath.com / Advisories:rPSA-2008-0216
debian.org / security/2008/dsa-1607
debian.org / security/2008/dsa-1615
debian.org / security/2008/dsa-1621
debian.org / security/2009/dsa-1697
mandriva.com / security/advisories
mandriva.com / security/advisories
mozilla.org / projects/security/known-vulnerabilities.html
mozilla.org / security/announce/2008/mfsa2008-25.html
redhat.com / support/errata/RHSA-2008-0547.html
redhat.com / support/errata/RHSA-2008-0549.html
redhat.com / support/errata/RHSA-2008-0569.html
securityfocus.com / archive/1/494080/100/0/threaded
securityfocus.com / bid/30038
securitytracker.com / id
ubuntu.com / usn/usn-619-1
ubuntu.com / usn/usn-629-1
vupen.com / english/advisories/2008/1993/references
vupen.com / english/advisories/2009/0977