CVE-2019-11701

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-23 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Mozilla Firefox: before 67.0 — fixed in 67.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 67.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1518627
https://www.mozilla.org/security/advisories/mfsa2019-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1518627
https://www.mozilla.org/security/advisories/mfsa2019-13/

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