GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload
Published Jul 25, 2025
8.7
HIGHCVSS 4.0
EPSS 3.66%
Description
An authenticated remote code execution vulnerability exists in GetSimpleCMS version 3.2.1. The application’s upload.php endpoint allows authenticated users to upload arbitrary files without proper validation of MIME types or extensions. By uploading a .pht file containing PHP code, an attacker can bypass blacklist-based restrictions and place executable code within the web root. A crafted request using a polyglot or disguised extension allows the attacker to execute the payload by accessing the file directly via the web server. This vulnerability exists due to the use of a blacklist for filtering file types instead of a whitelist.
Affected products
-
- Version 3.2.1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| GetSimple CMS Project | GetSimple CMS | n/a |
|
- 3.2.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jul 25, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.66% (0.03661) | 89.27th | v5 (v2026.06.15) |
| Sep 14, 2026 | 3.63% (0.03634) | 88.90th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.32% (0.02318) | 81.15th | v5 (v2026.06.15) |
| May 21, 2026 | 76.19% (0.76192) | 98.94th | v4 (v2025.03.14) |
| Apr 10, 2026 | 60.65% (0.60650) | 98.29th | v4 (v2025.03.14) |
| Dec 21, 2025 | 57.59% (0.57589) | 98.06th | v4 (v2025.03.14) |
| Nov 24, 2025 | 66.06% (0.66064) | 98.43th | v4 (v2025.03.14) |
| Oct 8, 2025 | 61.45% (0.61452) | 98.22th | v4 (v2025.03.14) |
| Jul 26, 2025 | 0.09% (0.00087) | 26.04th | v4 (v2025.03.14) |
References (6)
- https://get-simple.info product
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/get_simple_cms_upload_exec.rb exploitThird Party Advisory
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=27895 third-party-advisoryThird Party Advisory
- https://www.exploit-db.com/exploits/25405 exploitVDB Entry
- https://www.fortiguard.com/encyclopedia/ips/39295 third-party-advisoryThird Party Advisory
- https://www.vulncheck.com/advisories/getsimple-cms-auth-rce-via-arbitrary-php-file-upload third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://get-simple.info | product | |
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/get_simple_cms_upload_exec.rb | exploitThird Party Advisory | |
| https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=27895 | third-party-advisoryThird Party Advisory | |
| https://www.exploit-db.com/exploits/25405 | exploitVDB Entry | |
| https://www.fortiguard.com/encyclopedia/ips/39295 | third-party-advisoryThird Party Advisory | |
| https://www.vulncheck.com/advisories/getsimple-cms-auth-rce-via-arbitrary-php-file-upload | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.