CVE-2020-9995
Published: 02 April 2021
Summary
CVE-2020-9995 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Apple Macos Server. Its CVSS base score is 6.1 (Medium).
Operationally, ranked at the 41.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2020-30774
Vulnerability details
An issue existed in the parsing of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Server 5.11. Processing a maliciously crafted URL may lead to an open redirect or cross site scripting.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Validates web inputs to reject script-related content that could produce XSS.
Security awareness includes verifying URLs and avoiding untrusted redirects that lead to malicious sites.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.