What is CVE-2021-47831?

CVE-2021-47831 is a high-severity vulnerability in Sandboxie-Plus Sandboxie, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-01-16.

How severe is CVE-2021-47831?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Sandboxie-Plus Sandboxie

CVE-2021-47831

Sandboxie 5.49.7 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the container folder input field. Attackers can paste a large buffer of repeated characters into the Sandbox container folder setting to trigger an application crash.

EPSS: 0.003 (27.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Sandboxie-plus Sandboxie — versions 5.49.7

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47831?: CVE-2021-47831 is a high-severity vulnerability in Sandboxie-Plus Sandboxie, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-01-16.
How severe is CVE-2021-47831?: High severity. CVSS v3 base score is 7.5 out of 10.