CVE-2013-5596
The cycle collection (CC) implementation in Mozilla Firefox before 25.0, Firefox ESR 24.x before 24.1, Thunderbird before 24.1, and SeaMonkey before 2.22 does not properly determine the thread for release of an image object, which allows remote…
Does this matter?
Lower severity and a low EPSS score (3.14%). Track it; it rarely justifies an emergency change on its own.
Description
The cycle collection (CC) implementation in Mozilla Firefox before 25.0, Firefox ESR 24.x before 24.1, Thunderbird before 24.1, and SeaMonkey before 2.22 does not properly determine the thread for release of an image object, which allows remote attackers to execute arbitrary code or cause a denial of service (race condition and application crash) via a large HTML document containing IMG elements, as demonstrated by the Never-Ending Reddit on reddit.com.
- CVSS 2.0
- 6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
- EPSS
- 3.14% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- mozilla/thunderbird · mozilla/thunderbird esr · mozilla/firefox · mozilla/seamonkey
- Source
- security@mozilla.org
EPSS 3.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00006.html
- http://www.mozilla.org/security/announce/2013/mfsa2013-97.htmlVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=910881
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19066
- https://security.gentoo.org/glsa/201504-01
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00006.html
- http://www.mozilla.org/security/announce/2013/mfsa2013-97.htmlVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=910881
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19066
- https://security.gentoo.org/glsa/201504-01
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.