CVE-2021-47667 | BDVDB-2026-273621 Detail

ZendZendTo

Description#

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 off a file via a POST /dropoff request.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

References#

https://projectblack.io/blog/zendto-nday-vulnerabilities/

Exploit#

No public exploit known

History#

Version 12025-04-05Record published in the CVE List.
Version 22025-04-07Most recent update recorded in the CVE List.

Published

Published: 2025-04-05
Last modified: 2025-04-07

Vendor information

Vendor: Zend
Product: ZendTo

All Zend vulnerabilities

Score

10.0 Critical

EPSS

36.3%, Moderate

Estimated chance of exploitation in the next 30 days. EPSS percentile: 98.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Command Injection

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 5.24-3 and < 6.10-7
Fixed
6.10-7

Scoring System

CVSS v4.0

Not available

CVSS v3.1

10.0 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).