SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2015-0816

Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the…

EXPLOIT ✓MEDIUM 5.0EPSS 65.5%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 65.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
EPSS
65.53% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 24 August 2015
CISA KEV
Not listed
Weakness
CWE-264
Affected
mozilla/firefox · mozilla/thunderbird
Source
security@mozilla.org
EPSS trend
0%35%70%22 October 2026: 65.53%4 November 2026: 65.53%22 October 20264 November 2026

EPSS moved from 65.5% on 22 October 2026 to 65.5% 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-37958source ↗Mozilla Firefox - 'pdf.js' Privileged JavaScript Injection (Metasploit)multiple · Metasploitremote24 August 2015yes

References

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