CVE-2019-11717

Q: How do I fix CVE-2019-11717?

Published advisories record a fix for 6 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-2019-11717 being actively exploited?

Not that we know of. CVE-2019-11717 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 80% of all scored CVEs.

Q: How severe is CVE-2019-11717?

CVE-2019-11717 has a CVSS v3 base score of 5.3, 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-2019-11717 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 80th pctl

5.3

CVSS v3

NVD

Description

A vulnerability exists where the caret ("^") character is improperly escaped constructing some URIs due to it being used as a separator, allowing for possible spoofing of origin attributes. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

CWE-116

How to fix

Remediation Available

firefoxDebian

Fixed in:68.0-1CVE-2019-11717

firefoxUbuntu

Fixed in:68.0+build3-0ubuntu0.16.04.1USN-4054-1

Fixed in:68.0+build3-0ubuntu0.18.04.1USN-4054-1

thunderbirdUbuntu

Fixed in:1:60.8.0+build1-0ubuntu0.16.04.2USN-4064-1

Fixed in:1:60.8.0+build1-0ubuntu0.18.04.1USN-4064-1

DeveloperEditionWindows application

Affected:68.0Fixed in:68.0Mozilla

Affected:60.8.0Fixed in:60.8.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:68.0Fixed in:68.0Mozilla

Affected:60.8.0Fixed in:60.8.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:60.8.0Fixed in:60.8.0Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

2.13%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory3

Third-Party Advisory9

Related Vulnerabilities

Other CWE-116 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38475	Critical	9.1	100%	KEV	Fix
CVE-2022-36446	Critical	9.8	96%	-	Fix
CVE-2021-31806	Medium	6.5	96%	-	Fix
CVE-2022-30781	High	7.5	88%	-	Fix
CVE-2022-36099	Critical	9.9	76%	-	Fix
CVE-2022-36100	Critical	9.9	74%	-	Fix

Common questions

How do I fix CVE-2019-11717?

Published advisories record a fix for 6 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-2019-11717 being actively exploited?

Not that we know of. CVE-2019-11717 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 80% of all scored CVEs.

How severe is CVE-2019-11717?

CVE-2019-11717 has a CVSS v3 base score of 5.3, 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-2019-11717 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 2 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2019-11717

Markdown

[![CVE-2019-11717](https://tridentstack.com/cve/badge/CVE-2019-11717.svg)](https://tridentstack.com/cve/CVE-2019-11717)

HTML

<a href="https://tridentstack.com/cve/CVE-2019-11717"><img src="https://tridentstack.com/cve/badge/CVE-2019-11717.svg" alt="CVE-2019-11717"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

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.