Vulnerability Description
When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 92.0 |
| Mozilla | Firefox Esr | < 78.14 |
| Mozilla | Thunderbird | < 78.14 |
| Microsoft | Windows | - |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1721107ExploitIssue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202208-14Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-38/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-39/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-40/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-41/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-42/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1721107ExploitIssue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202208-14Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-38/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-39/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-40/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-41/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-42/Vendor Advisory
FAQ
What is CVE-2021-38492?
CVE-2021-38492 is a vulnerability with a CVSS score of 6.5 (MEDIUM). When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *Th...
How severe is CVE-2021-38492?
CVE-2021-38492 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-38492?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Microsoft Windows.