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CVE-2013-5596

19
FAUCET Score

CVE-2013-5596 describes a race condition vulnerability in the cycle collection implementation of Mozilla Firefox, Firefox ESR, Thunderbird, and SeaMonkey. This flaw, rated Medium severity (CVSS 6.8), allows remote attackers to execute arbitrary code or cause a denial of service by exploiting improper thread determination during image object release, typically via large HTML documents with numerous IMG elements. While it has a moderate potential impact (C:P/I:P/A:P), there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 24.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
17.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:17.0:*:*:*:*:*:*:*
17.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:17.0.1:*:*:*:*:*:*:*
17.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:17.0.2:*:*:*:*:*:*:*
17.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:17.0.3:*:*:*:*:*:*:*

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
3.14%
Probability of exploitation in next 30 days
EPSS Percentile
86.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0314 is in the 80th 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

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

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2013-5596Critical

Mozilla: Writing to cycle collected object during image decoding (MFSA 2013-97)

Oct 29, 2013

References

lists.opensuse.org / opensuse-security-announce/2013-11/msg00005.html
lists.opensuse.org / opensuse-security-announce/2013-11/msg00006.html
bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19066
security.gentoo.org / glsa/201504-01
mozilla.org / security/announce/2013/mfsa2013-97.html
Vendor Advisory