CVE-2021-31630 in the critical feed json
Command Injection in Open PLC Webserver v3 allows remote attackers to execute arbitrary code via the "Hardware Layer Code Box" component on…
published 2021-08-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18519
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 27.1%
- EPSS 27.1% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
Command Injection in Open PLC Webserver v3 allows remote attackers to execute arbitrary code via the "Hardware Layer Code Box" component on the "/hardware" page of the application.
Exploit prediction
27.07% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- youtube.com https://www.youtube.com/watch?v=l08DHB08Gow referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com https://packetstormsecurity.com/files/162563/OpenPLC-WebServer-3-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
youtube.com
/watch?v=l08DHB08Gow
exploit, third-party-advisory
-
packetstormsecurity.com
/files/162563/OpenPLC-WebServer-3-Remote-Code-Execution.html
exploit, third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-31630
- NVD CVE-2021-31630
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