CVE-2020-27998 json
Missing Authorization in FastReport
published 2020-10-29 6 y ago modified 2026-06-17 4 mo ago also GHSA-v726-3vg9-cp34 , EUVD-2021-1886
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.4%
- EPSS 2.4% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nuget FastReport.OpenSource 2020.4.0
- fast-report fastreport 2020.4.0
- github.com/FastReports/FastReport#206 pull request
Exploit prediction
2.38% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- securitylab.github.com https://securitylab.github.com/advisories/GHSL-2020-143-FastReportsInc-FastReports referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | FastReport.OpenSource | <2020.4.0 |
2020.4.0 |
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/FastReports/FastReport/pull/206
web, third-party-advisory
-
securitylab.github.com
/advisories/GHSL-2020-143-FastReportsInc-FastReports
advisory, exploit, third-party-advisory
-
opensource.fast-report.com
/2020/09/report-script-security.html
web, third-party-advisory
-
github.com
/FastReports/FastReport/compare/v2020.3.0...v2020.4.0
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-27998
advisory
Sources
- CVE List CVE-2020-27998
- GitHub Advisory GHSA-v726-3vg9-cp34
- NVD CVE-2020-27998
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