CVE-2024-11694Network attack vector

DOM-based XSS via SafeFrame CSP bypass

Published Nov 26, 2024 · Updated Nov 3, 2025

DOM-based XSS in affected Firefox, Firefox ESR, and Thunderbird releases allows remote attackers to present malicious frames as trusted content. The Google SafeFrame shim in the Web Compatibility extension bypasses a page's CSP frame-src restriction and inserts attacker-controlled frames into the DOM. Exploitation requires Enhanced Tracking Protection in Strict mode and attacker-controlled web content; Thunderbird mail reading is not exposed because scripting is disabled.

CVSS severity6.1
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in affected Firefox, Firefox ESR, and Thunderbird releases allows remote attackers to present malicious frames as trusted content. The Google SafeFrame shim in the Web Compatibility extension bypasses a page's CSP frame-src restriction and inserts attacker-controlled frames into the DOM. Exploitation requires Enhanced Tracking Protection in Strict mode and attacker-controlled web content; Thunderbird mail reading is not exposed because scripting is disabled.

The record

CVE
CVE-2024-11694
Published
Nov 26, 2024
Updated
Nov 3, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <133

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <133
Mozilla · Thunderbirdversion=unspecified <115.18; version=unspecified <128.5; version=unspecified <133
Mozilla · Firefox ESRversion=unspecified <115.18; version=unspecified <128.5

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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