Critical severity · published Apr 5, 2025
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…
10.0
CVSS
36.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)36.6% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
ZendTo · Zend
5.24-3 before 6.10-7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-47667
projectblack.io
https://projectblack.io/blog/zendto-nday-vulnerabilities/
More from ZendTo
9.8
CVE-2020-8986
lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta failed to properly check for equality when validating the session cookie, allowing an attacker to gain administrative access with…
8.8
CVE-2020-8985
ZendTo prior to 5.22-2 Beta allowed reflected XSS and CSRF via the unlock.tpl unlock user functionality
7.5
CVE-2020-8984
lib/NSSDropbox.php in ZendTo prior to 5.22-2 Beta allowed IP address spoofing via the X-Forwarded-For header
6.1
CVE-2021-27888
ZendTo before 6.06-4 Beta allows XSS during the display of a drop-off in which a filename has unexpected characters
6.1
CVE-2018-1000841
Zend.To version Prior to 5.15-1 contains a Cross Site Scripting (XSS) vulnerability in The verify.php page that can result in An attacker could execute arbitrary Javascript code…