CMSimple_XH 1.7.4 Authenticated Remote Code Execution via Content Editing
Priority HIGH 72CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.
Summary
CMSimple_XH 1.7.4 contains an authenticated remote code execution vulnerability in the content editing functionality that allows administrative users to upload malicious PHP files. Attackers with valid credentials can exploit the CSRF token mechanism to create a PHP shell file that enables arbitrary command execution on the server.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01077 65th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cmsimple-Xh | CMSimple_XH | 1.7.4 | — | No fix listed | CNA |
- CMSimple_XH VendorCmsimple-Xh Affected 1.7.4 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cmsimple-xh:cmsimple_xh:1.7.4:-:*:*:*:*:*:* | 1.7.4 | Vulnerable | Cmsimple-Xh |
- cpe:2.3:a:cmsimple-xh:cmsimple_xh:1.7.4:-:*:*:*:*:*:* Versions 1.7.4 Vulnerable ·Cmsimple-Xh
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47736
- 2026-10-03 Alias added: GHSA-353h-pmfp-h8fp
References
Exploit 1
Other 1
More Cmsimple-Xh Cmsimple Xh vulnerabilities
- TI-2025-39375 A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when… CVSS 3.1HIGH 7.1
- TI-2025-39374 An unauthenticated reflected cross-site scripting vulnerability in the query handling of… CVSS 3.1HIGH 7.1
- TI-2024-22786 CMSimple_XH 1.7.6 allows XSS by uploading a crafted SVG document. CVSS 3.1MEDIUM 6.1
- TI-2021-18881 CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. CVSS 3.1CRITICAL 10.0
Sources
- CVE-2021-47736 · CVE Program
- CVE-2021-47736 · NVD
- FIRST EPSS
- GHSA-353h-pmfp-h8fp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences