In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but Internet Explorer…
Priority LOW 19CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but Internet Explorer render HTML elements in a .eml file, because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.
Why it matters now
EPSS 0.00777 56th 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:get-simple:getsimple_cms:3.3.15:*:*:*:*:*:*:* | 3.3.15 | Vulnerable | GetSimple CMS |
- cpe:2.3:a:get-simple:getsimple_cms:3.3.15:*:*:*:*:*:*:* Versions 3.3.15 Vulnerable ·GetSimple CMS
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-19421
- 2026-10-03 Alias added: GHSA-6p82-h3ww-f963
References
More Getsimple Cms vulnerabilities
- TI-2019-08406 An issue was discovered in GetSimple CMS through 3.3.15. CVSS 3.0CRITICAL 9.8
- TI-2022-19953 GetSimple CMS v3.3.16 was discovered to contain a remote code execution (RCE)… CVSS 3.1CRITICAL 9.8
- TI-2022-01376 GetSimple CMS Content Module edit.php cross site scripting CVSS 3.1MEDIUM 5.4
- TI-2014-07155 GetSimple CMS 3.3.4 allows remote attackers to obtain sensitive information via a direct… CVSS 3.0HIGH 7.5
- TI-2020-14689 A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the… CVSS 3.1MEDIUM 6.1
- TI-2018-12225 An issue was discovered in GetSimple CMS v3.3.13. CVSS 3.0HIGH 8.8
Sources
- CVE-2018-19421 · CVE Program
- CVE-2018-19421 · NVD
- FIRST EPSS
- GHSA-6p82-h3ww-f963 · 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