What is CVE-2021-47667?

CVE-2021-47667 is a critical-severity vulnerability in Zend Zendto, classified under OS Command Injection. CVSS score: 10.0/10. Published 2025-04-05.

How severe is CVE-2021-47667?

Critical severity. CVSS v3 base score is 10.0 out of 10.

RCE in Zend Zendto

CVE-2021-47667

An OS command injection vulnerability in lib/NSSDropoff.php in ZendTo 5.24-3 through 6.x before 6.10-7 allows unauthenticated remote attackers to execute arbitrary commands via shell metacharacters in the tmp_name parameter when dropping o…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.263 (97.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Zend Zendto — versions 5.24-3

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@mitre.org

Frequently asked questions

What is CVE-2021-47667?: CVE-2021-47667 is a critical-severity vulnerability in Zend Zendto, classified under OS Command Injection. CVSS score: 10.0/10. Published 2025-04-05.
How severe is CVE-2021-47667?: Critical severity. CVSS v3 base score is 10.0 out of 10.