In CMS Made Simple 2.2.3.1, the is_file_acceptable function in…
Priority LOW 26CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
In CMS Made Simple 2.2.3.1, the is_file_acceptable function in modules/FileManager/action.upload.php only blocks file extensions that begin or end with a "php" substring, which allows remote attackers to bypass intended access restrictions or trigger XSS via other extensions, as demonstrated by .phtml, .pht, .html, or .svg.
Why it matters now
EPSS 0.00857 58th percentileScored 2026-11-07
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:cmsmadesimple:cms_made_simple:2.2.3.1:*:*:*:*:*:*:* | 2.2.3.1 | Vulnerable | Cmsmadesimple |
- cpe:2.3:a:cmsmadesimple:cms_made_simple:2.2.3.1:*:*:*:*:*:*:* Versions 2.2.3.1 Vulnerable ·Cmsmadesimple
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-16798
- 2026-10-03 Alias added: GHSA-23c3-237c-6x4c
References
More Cmsmadesimple Cms Made Simple vulnerabilities
- TI-2023-18726 CMS Made Simple v2.2.17 is vulnerable to Remote Command Execution via the File Upload Function. CVSS 3.1HIGH 8.8
- TI-2019-06534 An issue was discovered in CMS Made Simple 2.2.8. CVSS 3.0HIGH 8.1
- TI-2023-23207 An issue in CMSmadesimple v.2.2.18 allows a local attacker to execute arbitrary code via… CVSS 3.1HIGH 7.8
- TI-2024-18325 A remote code execution vulnerability has been identified in the User Defined Tags module… CVSS 3.1HIGH 7.2
- TI-2021-09905 File upload vulnerability in CMS Made Simple through 2.2.15 allows remote authenticated… CVSS 3.1HIGH 7.2
- TI-2017-06405 CMS Made Simple (CMSMS) 2.1.6 allows remote authenticated administrators to execute… CVSS 3.1HIGH 7.2
Sources
- CVE-2017-16798 · CVE Program
- CVE-2017-16798 · NVD
- FIRST EPSS
- GHSA-23c3-237c-6x4c · 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