CVE-2020-1911
moderate-risk
Published 2020-09-04
A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.
Do I need to act?
~
1.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (4)
Third Party Advisory
https://www.facebook.com/security/advisories/cve-2020-1911
Third Party Advisory
https://www.facebook.com/security/advisories/cve-2020-1911
40
/ 100
moderate-risk
Severity
32/34 · Critical
Exploitability
3/34 · Minimal
Exposure
5/34 · Minimal