What is CVE-2021-41862?

CVE-2021-41862 is a critical-severity vulnerability in Aviatorscript Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.8/10. Published 2021-10-02.

How severe is CVE-2021-41862?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Aviatorscript Project

CVE-2021-41862

AviatorScript through 5.2.7 allows code execution via an expression that is encoded with Byte Code Engineering Library (BCEL).

Published 2021-10-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Aviatorscript Project

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

github.com/killme2008/aviatorscript/issues/421 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-41862?: CVE-2021-41862 is a critical-severity vulnerability in Aviatorscript Project, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.8/10. Published 2021-10-02.
How severe is CVE-2021-41862?: Critical severity. CVSS v3 base score is 9.8 out of 10.