Is CVE-2019-11742 in the CISA KEV catalog?

No. CVE-2019-11742 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-11742?

CVE-2019-11742 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2019-11742?

CVE-2019-11742 has an EPSS score of 1.69% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-11742?

Upgrade firefox on debian unstable to 69.0-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2019-11742

MEDIUMEPSS 74th pctl

6.5

CVSS v3

NVD

Description

A same-origin policy violation occurs allowing the theft of cross-origin images through a combination of SVG filters and a <canvas> element due to an error in how same-origin policy is applied to cached image content. The resulting same-origin policy violation could allow for data theft. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

CWE-829

How to fix

Remediation Available

firefoxDebian

Fixed in:69.0-1CVE-2019-11742

firefoxUbuntu

Fixed in:69.0+build2-0ubuntu0.16.04.4USN-4122-1

Fixed in:69.0+build2-0ubuntu0.18.04.1USN-4122-1

thunderbirdUbuntu

Fixed in:1:60.9.0+build1-0ubuntu0.16.04.2USN-4150-1

Fixed in:1:60.9.0+build1-0ubuntu0.18.04.1USN-4150-1

DeveloperEditionWindows application

Affected:60.9.0Fixed in:60.9.0Mozilla

Affected:69.0Fixed in:69.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:60.9.0Fixed in:60.9.0Mozilla

Affected:69.0Fixed in:69.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:68.0 68.1.0Fixed in:68.1.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:60.9.0Fixed in:60.9.0Mozilla

Affected:68.0 68.1.0Fixed in:68.1.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

1.69%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory6

Other references6

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-25.