SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2013-1670

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 does not prevent acquisition of chrome privileges during calls to content…

EXPLOIT ✓MEDIUM 4.3EPSS 12.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 12.0%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 does not prevent acquisition of chrome privileges during calls to content level constructors, which allows remote attackers to bypass certain read-only restrictions and conduct cross-site scripting (XSS) attacks via a crafted web site.

CVSS 2.0
4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
EPSS
12.00% probability · 96th percentile
Public exploits
1 in Exploit-DB · verified · first 19 August 2014
CISA KEV
Not listed
Weakness
CWE-79, CWE-264
Affected
mozilla/firefox · mozilla/thunderbird · mozilla/thunderbird esr
Source
security@mozilla.org
EPSS trend
0%8%15%25 October 2026: 12.00%4 November 2026: 12.00%25 October 20264 November 2026

EPSS moved from 12.0% on 25 October 2026 to 12.0% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-34363source ↗Mozilla Firefox - toString console.time Privileged JavaScript Injection (Metasploit)multiple · Metasploitremote19 August 2014yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.