CVE-2021-23957

Description

Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.

7.4

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.29%

Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox

References

Link	Tags
https://www.mozilla.org/security/advisories/mfsa2021-03/	release notes vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1584582	issue tracking permissions required vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-23957?: CVE-2021-23957 has been scored as a high severity vulnerability.
How to fix CVE-2021-23957?: To fix CVE-2021-23957, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23957 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-23957 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23957?: CVE-2021-23957 affects Mozilla Firefox.

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