CVE-2011-2993
The implementation of digital signatures for JAR files in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, and possibly other products does not prevent calls from unsigned JavaScript code to signed code, which allows remote attackers to bypass…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The implementation of digital signatures for JAR files in Mozilla Firefox 4.x through 5, SeaMonkey 2.x before 2.3, and possibly other products does not prevent calls from unsigned JavaScript code to signed code, which allows remote attackers to bypass the Same Origin Policy and gain privileges via a crafted web site, a different vulnerability than CVE-2008-2801.
- CVSS 2.0
- 9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
- EPSS
- 1.26% probability · 69th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-264
- Affected
- mozilla/firefox · mozilla/seamonkey
- Source
- cve@mitre.org
EPSS 1.3% 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/2011-08/msg00023.html
- http://www.mozilla.org/security/announce/2011/mfsa2011-29.htmlVendor Advisory
- http://www.mozilla.org/security/announce/2011/mfsa2011-33.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=657267
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14055
- http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
- http://www.mozilla.org/security/announce/2011/mfsa2011-29.htmlVendor Advisory
- http://www.mozilla.org/security/announce/2011/mfsa2011-33.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=657267
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14055
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.