Critical severity · published Dec 15, 2022
CVE-2021-39426
An issue was discovered in /Upload/admin/admin_notify.php in Seacms 11.4 allows attackers to execute arbitrary php code via the notify1 parameter when the action parameter equals…
9.8
CVSS
0.9%
EPSS
No
On KEV
Description
An issue was discovered in /Upload/admin/admin_notify.php in Seacms 11.4 allows attackers to execute arbitrary php code via the notify1 parameter when the action parameter equals set.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Seacms · Seacms
11.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39426
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39426
Exploit
https://github.com/seacms-com/seacms/issues/21
More from Seacms
9.8
CVE-2025-15002
SeaCMS mysqli.class.php sql injection
9.8
CVE-2025-10662
SeaCMS admin_members.php sql injection
9.8
CVE-2025-44073
SeaCMS v13.3 was discovered to contain a SQL injection vulnerability via the component admin_comment_news.php
9.8
CVE-2025-44072
SeaCMS v13.3 was discovered to contain a SQL injection vulnerability via the component admin_manager.php
9.8
CVE-2025-44071
SeaCMS v13.3 was discovered to contain a remote code execution (RCE) vulnerability via the component phomebak.php