Vulnerability Details CVE-2021-32827
MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 54.2%
CVSS Severity
CVSS v3 Score 6.1
CVSS v2 Score 6.8
References
Products affected by CVE-2021-32827
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cpe:2.3:a:mock-server:mockserver:-
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cpe:2.3:a:mock-server:mockserver:1.0
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cpe:2.3:a:mock-server:mockserver:1.1
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cpe:2.3:a:mock-server:mockserver:1.10
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cpe:2.3:a:mock-server:mockserver:1.11
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cpe:2.3:a:mock-server:mockserver:1.12
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cpe:2.3:a:mock-server:mockserver:1.2
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cpe:2.3:a:mock-server:mockserver:1.3
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cpe:2.3:a:mock-server:mockserver:1.4
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cpe:2.3:a:mock-server:mockserver:1.5
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cpe:2.3:a:mock-server:mockserver:1.6
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cpe:2.3:a:mock-server:mockserver:1.7
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cpe:2.3:a:mock-server:mockserver:1.8
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cpe:2.3:a:mock-server:mockserver:1.9
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cpe:2.3:a:mock-server:mockserver:2.0
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cpe:2.3:a:mock-server:mockserver:2.1
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cpe:2.3:a:mock-server:mockserver:2.10
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cpe:2.3:a:mock-server:mockserver:2.3
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cpe:2.3:a:mock-server:mockserver:2.5
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cpe:2.3:a:mock-server:mockserver:2.6
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cpe:2.3:a:mock-server:mockserver:2.7
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cpe:2.3:a:mock-server:mockserver:2.8
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cpe:2.3:a:mock-server:mockserver:2.9
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cpe:2.3:a:mock-server:mockserver:3.0
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cpe:2.3:a:mock-server:mockserver:3.1
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cpe:2.3:a:mock-server:mockserver:3.10.0
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cpe:2.3:a:mock-server:mockserver:3.10.1
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cpe:2.3:a:mock-server:mockserver:3.10.2
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cpe:2.3:a:mock-server:mockserver:3.10.3
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cpe:2.3:a:mock-server:mockserver:3.10.4
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cpe:2.3:a:mock-server:mockserver:3.10.5
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cpe:2.3:a:mock-server:mockserver:3.10.6
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cpe:2.3:a:mock-server:mockserver:3.10.7
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cpe:2.3:a:mock-server:mockserver:3.10.8
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cpe:2.3:a:mock-server:mockserver:3.11
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cpe:2.3:a:mock-server:mockserver:3.12
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cpe:2.3:a:mock-server:mockserver:3.2
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cpe:2.3:a:mock-server:mockserver:3.3
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cpe:2.3:a:mock-server:mockserver:3.4
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cpe:2.3:a:mock-server:mockserver:3.5
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cpe:2.3:a:mock-server:mockserver:3.6
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cpe:2.3:a:mock-server:mockserver:3.6.1
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cpe:2.3:a:mock-server:mockserver:3.6.2
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cpe:2.3:a:mock-server:mockserver:3.7
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cpe:2.3:a:mock-server:mockserver:3.8
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cpe:2.3:a:mock-server:mockserver:3.8.1
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cpe:2.3:a:mock-server:mockserver:3.8.2
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cpe:2.3:a:mock-server:mockserver:3.9
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cpe:2.3:a:mock-server:mockserver:3.9.1
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cpe:2.3:a:mock-server:mockserver:3.9.10
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cpe:2.3:a:mock-server:mockserver:3.9.11
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cpe:2.3:a:mock-server:mockserver:3.9.12
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cpe:2.3:a:mock-server:mockserver:3.9.13
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cpe:2.3:a:mock-server:mockserver:3.9.14
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cpe:2.3:a:mock-server:mockserver:3.9.15
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cpe:2.3:a:mock-server:mockserver:3.9.16
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cpe:2.3:a:mock-server:mockserver:3.9.17
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cpe:2.3:a:mock-server:mockserver:3.9.18
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cpe:2.3:a:mock-server:mockserver:3.9.2
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cpe:2.3:a:mock-server:mockserver:3.9.3
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cpe:2.3:a:mock-server:mockserver:3.9.4
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cpe:2.3:a:mock-server:mockserver:3.9.5
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cpe:2.3:a:mock-server:mockserver:3.9.6
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cpe:2.3:a:mock-server:mockserver:3.9.7
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cpe:2.3:a:mock-server:mockserver:3.9.8
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cpe:2.3:a:mock-server:mockserver:3.9.9
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cpe:2.3:a:mock-server:mockserver:4.0.0
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cpe:2.3:a:mock-server:mockserver:4.1.0
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cpe:2.3:a:mock-server:mockserver:5.0.0
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cpe:2.3:a:mock-server:mockserver:5.0.1
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cpe:2.3:a:mock-server:mockserver:5.1.0
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cpe:2.3:a:mock-server:mockserver:5.1.1
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cpe:2.3:a:mock-server:mockserver:5.10
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cpe:2.3:a:mock-server:mockserver:5.10.0
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cpe:2.3:a:mock-server:mockserver:5.11.0
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cpe:2.3:a:mock-server:mockserver:5.11.1
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cpe:2.3:a:mock-server:mockserver:5.11.2
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cpe:2.3:a:mock-server:mockserver:5.2.0
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cpe:2.3:a:mock-server:mockserver:5.2.1
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cpe:2.3:a:mock-server:mockserver:5.2.2
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cpe:2.3:a:mock-server:mockserver:5.2.3
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cpe:2.3:a:mock-server:mockserver:5.3.0
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cpe:2.3:a:mock-server:mockserver:5.4.1
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cpe:2.3:a:mock-server:mockserver:5.5.0
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cpe:2.3:a:mock-server:mockserver:5.5.1
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cpe:2.3:a:mock-server:mockserver:5.5.2
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cpe:2.3:a:mock-server:mockserver:5.5.3
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cpe:2.3:a:mock-server:mockserver:5.5.4
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cpe:2.3:a:mock-server:mockserver:5.6.0
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cpe:2.3:a:mock-server:mockserver:5.6.1
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cpe:2.3:a:mock-server:mockserver:5.7.0
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cpe:2.3:a:mock-server:mockserver:5.7.1
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cpe:2.3:a:mock-server:mockserver:5.7.2
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cpe:2.3:a:mock-server:mockserver:5.8.0
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cpe:2.3:a:mock-server:mockserver:5.8.1
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cpe:2.3:a:mock-server:mockserver:5.9.0
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cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0