CVE-2020-21474 json
File Upload vulnerability in NucleusCMS v.3.71 allows a remote attacker to execute arbitrary code via the /nucleus/plugins/skinfiles/?dir=r…
published 2023-06-20 3 y ago modified 2026-06-17 4 mo ago also EUVD-2020-14246
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
File Upload vulnerability in NucleusCMS v.3.71 allows a remote attacker to execute arbitrary code via the /nucleus/plugins/skinfiles/?dir=rsd parameter.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 22 mo ago
Exploit prediction
1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/NucleusCMS/NucleusCMS/issues/95 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/NucleusCMS/NucleusCMS/issues/95
exploit, issue-tracking
Sources
- CVE List CVE-2020-21474
- NVD CVE-2020-21474
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