CVE-2017-8700
CVE-2017-8700 is a high-severity vulnerability in Microsoft Asp.net Core with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 10% (95th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Asp.net Core
- Published:
- Last modified:
Description
ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing (CORS) configurations and retrieve normally restricted content from a web application, aka "ASP.NET Core Information Disclosure Vulnerability".
Frequently asked questions
- What is CVE-2017-8700?
- ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing (CORS) configurations and retrieve normally restricted content from a web application, aka "ASP.NET Core Information Disclosure Vulnerability".
- How severe is CVE-2017-8700?
- CVE-2017-8700 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2017-8700 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-8700?
- CVE-2017-8700 primarily affects Microsoft Asp.net Core. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2017-8700?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2017-8700 published?
- CVE-2017-8700 was published on 2017-11-15 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/101712
- http://www.securitytracker.com/id/1039793
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700
Affected products (3)
- cpe:2.3:a:microsoft:asp.net_core:1.0:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:asp.net_core:1.1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:asp.net_core:2.0:*:*:*:*:*:*:*
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