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CVE-2013-0787

25
FAUCET Score

CVE-2013-0787 describes a critical use-after-free vulnerability in the nsEditor::IsPreformatted function within Mozilla Firefox, Firefox ESR, Thunderbird, Thunderbird ESR, and SeaMonkey. This flaw allows remote attackers to execute arbitrary code by manipulating an execCommand call. With a CVSS score of 9.3, this vulnerability is highly severe, requiring medium attack complexity but potentially leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) or active exploitation (KEV, Hot List) has been identified, and community discussion is minimal, the high FAUCET Risk Score of 82/100 indicates its significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 19.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
19.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:19.0:*:*:*:*:*:*:*
17.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:17.0:*:*:*:*:*:*:*
17.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:17.0.1:*:*:*:*:*:*:*
17.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:17.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.40%
Probability of exploitation in next 30 days
EPSS Percentile
92.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0640 is in the 67th percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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 (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:17.0.3-2.el5_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:17.0.3-2.el5_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:17.0.3-2.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:17.0.3-2.el6_4
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox

Vendor Advisories (1)

redhatCVE-2013-0787Critical

Mozilla: Use-after-free in HTML Editor (MFSA 2013-29)

Mar 8, 2013

References

h30499.www3.hp.com / t5/HP-Security-Research-Blog/Pwn2Own-2013/ba-p/5981157
lists.opensuse.org / opensuse-security-announce/2013-03/msg00010.html
lists.opensuse.org / opensuse-security-announce/2013-03/msg00023.html
lists.opensuse.org / opensuse-security-announce/2013-03/msg00025.html
lists.opensuse.org / opensuse-security-announce/2013-03/msg00026.html
lists.opensuse.org / opensuse-security-announce/2013-03/msg00028.html
rhn.redhat.com / errata/RHSA-2013-0614.html
rhn.redhat.com / errata/RHSA-2013-0627.html
bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16737
twitter.com / thezdi/statuses/309484730506698752
twitter.com / VUPEN/statuses/309505403631325184
debian.org / security/2013/dsa-2699
mozilla.org / security/announce/2013/mfsa2013-29.html
Vendor Advisory
securityfocus.com / bid/58391
ubuntu.com / usn/USN-1758-1