CVE-2021-47735
CMSimple 5.4 Authenticated Remote Code Execution via Template Editing
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.
| CWE | CWE-94 |
| Vendor | cmsimple |
| Product | cmsimple |
| Published | Dec 23, 2025 |
| Last Updated | Mar 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Cmsimple / Cmsimple
5.4
References
Credits
pussycat0x