CISA KEV · Known exploitedCritical

CVE-2019-11708

Mozilla Firefox and Thunderbird

Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing arbitrary code on the user's computer. This vulnerability affects Firefox ESR < 60.7.2, Firefox < 67.0.4, and Thunderbird < 60.7.2.

CVSS: 10
EPSS: 55.9%
CISA KEV: Listed
Published: 2019.07.23

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability55.9%

Technical severityCVSS 10

Vulnerability overview

Affected product and versions

Product: Mozilla Firefox and Thunderbird
Affected versions: unspecified, < 60.7.2, < 67.0.4
Fixed versions: 60.7.2, 67.0.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2022.06.13

1
Identify
Confirm that Mozilla Firefox and Thunderbird and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE: CWE-20
KEV added: 2022.05.23
Ransomware use: 미확인