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CVE-2015-0831

19
FAUCET Score

CVE-2015-0831 is a use-after-free vulnerability in the IndexedDB component of Mozilla Firefox, Firefox ESR, and Thunderbird. This flaw allows remote attackers to execute arbitrary code or cause a denial of service through heap memory corruption when handling crafted content during IndexedDB index creation. With a CVSS score of 6.8, it is considered a medium-severity vulnerability, requiring medium attack complexity and potentially leading to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage indicate limited attention to this specific CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 31.4CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
31.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:31.0:*:*:*:*:*:*:*
31.1.2CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:31.1.2:*:*:*:*:*:*:*
31.2CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:31.2:*:*:*:*:*:*:*
31.3CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:31.3:*:*:*:*:*:*:*

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
4.16%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0416 is in the 86th percentile among its peer group of 19,958 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

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 (9)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:31.5.0-2.ael7b_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:31.5.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:31.5.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:31.5.0-1.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:31.5.0-1.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:31.5.0-2.el7_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: xulrunner-0:31.5.0-1.el7_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:31.5.0-2.ael7b_1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-0831Critical

Mozilla: Use-after-free in IndexedDB (MFSA 2015-16)

Feb 24, 2015

References

lists.opensuse.org / opensuse-security-announce/2015-03/msg00000.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-03/msg00001.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-03/msg00006.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-03/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-03/msg00008.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-03/msg00026.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-07/msg00031.html
lists.opensuse.org / opensuse-updates/2015-03/msg00067.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0265.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0266.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0642.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201504-01
debian.org / security/2015/dsa-3174
Third Party Advisory
debian.org / security/2015/dsa-3179
Third Party Advisory
mozilla.org / security/announce/2015/mfsa2015-16.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2015-2511959.html
Third Party Advisory
securityfocus.com / bid/72746
Third Party AdvisoryVDB Entry
securitytracker.com / id/1031791
Third Party AdvisoryVDB Entry
securitytracker.com / id/1031792
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2505-1
Third Party Advisory
ubuntu.com / usn/USN-2506-1
Third Party Advisory