CVE-2020-27998
Missing Authorization in FastReport
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
CVE-2020-27998- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-862
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
CVE-2020-27998- Updated
- 2026-11-02
EUVDEUVD-2021-1886 No score
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
EUVD-2021-1886- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v726-3vg9-cp34
Missing Authorization in FastReport
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
GHSA-v726-3vg9-cp34- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-862
- Updated
- 2026-11-02
OSV
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
CVE-2020-27998- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-v726-3vg9-cp34
Missing Authorization in FastReport
An issue was discovered in FastReport before 2020.4.0. It lacks a ScriptSecurity feature and therefore may mishandle (for example) GetType, typeof, TypeOf, DllImport, LoadLibrary, and GetProcAddress.
- Record
GHSA-v726-3vg9-cp34- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-862
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
FastReport.OpenSourceNuGet |
before 2020.4.0 | 2020.4.0 |
FastReport.OpenSourceNuGet |
before 2020.4.0, plus listed versions 2018.4.162018.4.72018.4.92019.1.02019.1.20 Show 17 moreShow less2019.2.02019.3.02019.3.132019.3.192020.1.202020.1.252020.1.282020.2.02020.2.92020.3.02020.3.12020.3.102020.3.142020.3.172020.3.212020.3.222020.3.4 |
2020.4.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-27998 is a critical vulnerability (CVSS 9.8) in Fast-report Fastreport, published October 29, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.38%, the 84th percentile. Fixed in FastReport.OpenSource 2020.4.0.
References
github.com/FastReports/FastReport/pull/206
opensource.fast-report.com/2020/09/report-script-security.html
securitylab.github.com/advisories/GHSL-2020-143-FastReportsInc-FastReports
nvd.nist.gov/vuln/detail/CVE-2020-27998