CVE-2019-9816

high-risk
Published 2019-07-23

A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

Do I need to act?

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38.2% chance of exploitation in next 30 days
EPSS score — higher than 62% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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1 public exploit available
46940
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (3)

Affected Vendors

Mozilla

References (8)

Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1536768
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-13/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-14/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-15/
Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1536768
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-13/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-14/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-15/
51
/ 100
high-risk
Severity 18/34 · Moderate
Exploitability 24/34 · High
Exposure 9/34 · Low