CVE-2019-11701

Name: CVE-2019-11701
Creator: NVD / NIST
Published: 2019-07-23T14:15:14.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.65%

Last modified Jun 17, 2026

CVE-2019-11701 is a vulnerability of currently unknown severity. The default webcal: protocol handler will load a web site vulnerable to cross-site scripting (XSS) attacks. This default was left in place as a legacy feature and has now been removed. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

The default webcal: protocol handler will load a web site vulnerable to cross-site scripting (XSS) attacks. This default was left in place as a legacy feature and has now been removed. *Note: this issue only affects users with an account on the vulnerable service. Other users are unaffected.*. This vulnerability affects Firefox < 67.

Metrics

EPSS Probability

0.65%

46.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 67.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1518627Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-13/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1518627Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-13/Vendor Advisory

Timeline

Published: Jul 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11701?

How severe is CVE-2019-11701?

Severity scoring for CVE-2019-11701 is pending analysis. The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11701?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11701?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST