Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2011-2363

30
FAUCET Score

CVE-2011-2363 is a critical use-after-free vulnerability in the nsSVGPointList::AppendElement function affecting Mozilla Firefox before 3.6.18, Thunderbird before 3.1.11, and SeaMonkey through 2.0.14. This flaw allows remote attackers to trigger a denial of service or potentially execute arbitrary code through specially crafted SVG element lists involving user-supplied callbacks. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*
1.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
1.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.77%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0577 is in the 87th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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 6Fixed in: thunderbird-0:3.1.11-2.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.6.18-2.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: thunderbird-0:1.5.0.12-39.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-71.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.6.18-1.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.2.18-2.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.24-18.el5_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:3.6.18-1.el6_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:1.9.2.18-2.el6_1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-2363Critical

Mozilla Multiple dangling pointer vulnerabilities (MFSA 2011-23)

Jun 21, 2011

References

lists.opensuse.org / opensuse-security-announce/2011-07/msg00001.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/45002
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14046
support.avaya.com / css/P8/documents/100144854
support.avaya.com / css/P8/documents/100145333
debian.org / security/2011/dsa-2268
debian.org / security/2011/dsa-2269
debian.org / security/2011/dsa-2273
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-23.html
Vendor Advisory
redhat.com / support/errata/RHSA-2011-0885.html
redhat.com / support/errata/RHSA-2011-0886.html
redhat.com / support/errata/RHSA-2011-0887.html
redhat.com / support/errata/RHSA-2011-0888.html
ubuntu.com / usn/USN-1149-1