# CVE-2013-1690: Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability

Source: https://junglewise.ai/threats/cve-2013-1690-mozilla-firefox-and-thunderbird-denial-of-service-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-28. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2013-1690 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-03-28

Mozilla Firefox and Thunderbird fail to properly handle onreadystatechange events during page reloads. This flaw allows remote attackers to trigger an application crash or potentially execute arbitrary code by inducing an attempt to execute data at an unmapped memory location via a crafted website.

Technologies: [Mozilla Firefox](https://junglewise.ai/threats/technologies/firefox), [Mozilla Thunderbird](https://junglewise.ai/threats/technologies/thunderbird). Vendors: [Mozilla](https://junglewise.ai/threats/vendors/mozilla).

## Quick answers

**Is CVE-2013-1690 exploited in the wild?** Yes. CVE-2013-1690 is known to be exploited in the wild, first recorded on 28 March 2022. Treat it as urgent.

**How severe is CVE-2013-1690?** Critical severity, with a CVSS score of 8.8, published 28 March 2022.

**Which products and versions are affected?** Mozilla Firefox before 22.0; Mozilla Firefox ESR 17.x before 17.0.7; Mozilla Thunderbird before 17.0.7; Mozilla Thunderbird ESR 17.x before 17.0.7.

**Is there a fix for CVE-2013-1690?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2013-1690 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2013-1690?** Check whether you run Mozilla Firefox or Mozilla Thunderbird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Mozilla Firefox before 22.0
- Mozilla Firefox ESR 17.x before 17.0.7
- Mozilla Thunderbird before 17.0.7
- Mozilla Thunderbird ESR 17.x before 17.0.7

## Timeline

- 2013-06-25: disclosed: Mozilla Foundation Security Advisory MFSA2013-53 published
- 2022-03-28: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-03-28: exploited: CISA confirms exploitation in the wild

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