What is CVE-2013-1670?

CVE-2013-1670 is a vulnerability in Mozilla Firefox, classified under Cross-site Scripting. Published 2013-05-16.

Is CVE-2013-1670 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Mozilla Firefox

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 level constructors, which allows remote attackers to bypass certain read-only restrictions and conduct cross-site scripting (XSS) attacks via a crafted web site.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2013-05-16 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.109 (95.7th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.109 · newest: 0.109 · change: 0.000

Affected products

Mozilla Firefox — versions 19.0, 19.0.1, 19.0.2
Mozilla Thunderbird — versions 17.0, 17.0.1, 17.0.2
Mozilla Thunderbird Esr — versions 17.0, 17.0.1, 17.0.2

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:17046 (signature, vdb-entry)
www.debian.org/security/2013/dsa-2699 (vendor-advisory)
www.mandriva.com/security/advisories (vendor-advisory)
bugzilla.mozilla.org/show_bug.cgi
lists.opensuse.org/opensuse-security-announce/2013-05/msg00010.html (vendor-advisory)
www.mozilla.org/security/announce/2013/mfsa2013-42.html (Vendor Advisory)
www.ubuntu.com/usn/USN-1823-1 (vendor-advisory)
rhn.redhat.com/errata/RHSA-2013-0821.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2013-06/msg00006.html (vendor-advisory)
www.osvdb.org/93427 (vdb-entry)

Frequently asked questions

What is CVE-2013-1670?: CVE-2013-1670 is a vulnerability in Mozilla Firefox, classified under Cross-site Scripting. Published 2013-05-16.
Is CVE-2013-1670 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.