Known Exploited Vulnerability

CVE-2013-1690

Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability

Past federal due date 11 public exploits Added 28 Mar 2022 Due 18 Apr 2022 · 1567 days ago

VendorMozilla

ProductFirefox and Thunderbird

WeaknessCWE-119

RansomwareNone confirmed

What the flaw is

Mozilla Firefox and Thunderbird do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial-of-service (DoS) or possibly execute malicious code via a crafted web site.

Description as published by CISA. We have not independently reproduced it.

What CISA requires

Apply updates per vendor instructions.

This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.

Public exploit code

11 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.

Showing 8 of 11. Full list in the trickest/cve dataset.

Vendor advisories

nvd.nist.gov/vuln/detail/CVE-2013-1690

Primary sources

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Other Mozilla entries

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CVE-2010-3765

Source: CISA KEV catalog · last verified July 31, 2026. Rebuilt automatically twice a day.