CVE-2021-31630 Command injection in n/a

What is CVE-2021-31630?

CVE-2021-31630 is a high-severity command injection vulnerability in n/a, published on 3 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-94

Which versions are affected by CVE-2021-31630?

It affects 1 product.

Products include Openplcproject Openplc V3 Firmware.

How do I fix CVE-2021-31630?

No fix has been published for CVE-2021-31630 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-31630 being exploited?

There is no known exploitation of CVE-2021-31630 in the wild and no public exploit code.

Public exploit code: 12 proofs of concept on GitHub.

Other vulnerabilities in n/a

• CVE-2026-28205 Initialization of a resource with an insecure default in OpenPLC_V3 Critical 9.2
• CVE-2026-35556 Plaintext storage of a password in OpenPLC_V3 Critical 9.2
• CVE-2024-34026 Memory corruption in OpenPLC v3 Critical 9.0
• CVE-2026-35063 Missing Authorization in OpenPLC_V3 High 8.7
• CVE-2024-36980 Denial of service in OpenPLC v3 High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2c27-grr5-3w2g.