CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability.
Priority MEDIUM 51CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. To exploit this vulnerability, an attacker must use the "File" parameter to upload a PHP payload to get a reverse shell from the vulnerable host.
Why it matters now
EPSS 0.04826 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions 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-2021-42645
- 2026-10-03 Alias added: GHSA-56jv-hmch-qm6c
References
More Cmsimple-Xh Cmsimple Xh vulnerabilities
- TI-2021-22353 CMSimple_XH 1.7.4 Authenticated Remote Code Execution via Content Editing CVSS 4.0HIGH 8.6
- 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
Sources
- CVE-2021-42645 · CVE Program
- CVE-2021-42645 · NVD
- FIRST EPSS
- GHSA-56jv-hmch-qm6c · 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