CVE-2021-23957
HIGHCVSS 7.4/10EPSS 0.79%
Last modified
CVE-2021-23957 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. EPSS estimates a 0.79% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 85.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1584582Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-03/Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1584582Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-03/Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23957?
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.
How severe is CVE-2021-23957?
CVE-2021-23957 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23957?
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-2021-23957?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST