CVE-2019-11742

Q: How do I fix CVE-2019-11742?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2019-11742 being actively exploited?

Not that we know of. CVE-2019-11742 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 76% of all scored CVEs.

Q: How severe is CVE-2019-11742?

CVE-2019-11742 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2019-11742 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 76th 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

thunderbirdAmazon

Fixed in:0:60.9.0-1.amzn2.0.1

thunderbird-debuginfoAmazon

Fixed in:0:60.9.0-1.amzn2.0.1

firefoxDebian

Fixed in:69.0-1CVE-2019-11742

firefoxUbuntu

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

This Ubuntu release reached end-of-life on 2021-04-02.

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

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

thunderbirdUbuntu

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

This Ubuntu release reached end-of-life on 2021-04-02.

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

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Firefox Developer Edition (en-US)Windows application

Affected:60.9.0Fixed in:60.9.0Mozilla

Affected:69.0Fixed in:69.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:69.0Fixed in:69.0Mozilla

Affected:60.9.0Fixed in:60.9.0Mozilla

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

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Vendor Advisory6

Other references6

Related Vulnerabilities

Other CWE-829 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-17246	Critical	9.8	82%	-	Fix
CVE-2024-5762	High	8.1	72%	-	-
CVE-2026-0770	Critical	9.8	63%	KEV	-
CVE-2018-7422	High	7.5	62%	-	-
CVE-2023-2249	High	8.8	61%	-	-
CVE-2025-32463	Critical	9.3	59%	KEV	Fix

Common questions

How do I fix CVE-2019-11742?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2019-11742 being actively exploited?

Not that we know of. CVE-2019-11742 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 76% of all scored CVEs.

How severe is CVE-2019-11742?

CVE-2019-11742 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2019-11742 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2026-06-17.